Choosing a WordPress theme feels like dating: you’re wooed by good looks, but you’ll get ghosted by poor performance and accessibility problems later. I’ve swapped themes enough times to know which red flags are cosmetic and which will sabotage your blog’s growth. This guide walks you through the exact things I test—typography, contrast, keyboard navigation, code bloat, and real audits—so you can pick a theme that respects readers and scales with your site. ⏱️ 11-min read
Readability, accessibility, and performance aren’t optional extras; they’re the core features that keep visitors reading and returning. Below I give concrete targets (contrast ratios, font sizes, Core Web Vitals) and a repeatable vetting workflow that fits a staging site test. Think of it as a checklist you can actually finish before committing to a design you’ll be stuck with for months.
Define readability and accessibility in WordPress themes
Readability is the experience of your content being easy to scan and absorb: good typography, the right line length, comfortable spacing, and a predictable visual rhythm. Accessibility is the practice of making your content usable by people with disabilities—keyboard navigation, screen reader-friendly markup, and clear labels. They overlap because readable design tends to be accessible design. If your content looks like a ransom note, it’s neither.
Concrete targets to aim for:
- Body font size: around 16px (1rem) as a baseline.
- Line height: 1.5–1.75 so text breathes but doesn’t wander like a lost paragraph.
- Line length: roughly 50–75 characters per line for optimal scanning—too long and readers nap; too short and they get whiplash.
- Contrast: at least 4.5:1 for body text (WCAG AA). Don’t make people squint—this isn’t a test of grit.
- Visible focus indicators: keyboard users must see where focus lands; no invisible outlines or mysterious focus traps.
Accessibility-specific items to expect from a theme: semantic HTML (header, nav, main, footer), landmarks, skip links to jump past navigation, and sensible ARIA where necessary. In practice, a theme that nails readable typography and stable layout will already solve many accessibility headaches. It’s not a binary choice—design with options so both readers and assistive tech win.
Prioritize performance: choose themes with clean code and fast load times
Performance is the plumbing behind readability. Slow or jittery pages scramble the user experience—text that appears late or shifts as it loads ruins comprehension and confuses screen readers. A theme with clean, lean code is like a well-organized kitchen: everything you need is within reach, nothing falls on your foot, and you can actually cook.
What to expect from a performance-friendly theme:
- Minimal render-blocking CSS and JavaScript. Big theme frameworks that load entire libraries for one small feature are the web equivalent of buying a jumbo truck to commute to the bakery.
- Critical CSS inlined or loaded early so the first meaningful paint happens fast.
- Noncritical scripts loaded with async/defer and CSS split so the reading experience starts immediately.
- Font optimizations like subsetting and font-display strategies to avoid layout shifts from late font swaps.
Targets and tools: aim for LCP under 2.5s, CLS under 0.1, and low Total Blocking Time (TBT). Use Lighthouse in Chrome DevTools to inspect these metrics during a theme demo—run the audit on the demo homepage and a typical article. If the theme demo struggles on Lighthouse, assume your real site will too. Real audits matter more than marketing claims: don’t just trust screenshots that look pretty while your metrics cry in private. For reference, see Google’s Lighthouse documentation for what each metric means and how to measure it.
Typography and color: ensure legible type and accessible contrast
Typography and color are the quiet gatekeepers of your blog—boring when perfect, painfully obvious when broken. Choose a theme that lets you control base sizes, line height, and responsive scaling without wrestling with custom CSS every time you want a tweak. If your theme treats typography like an afterthought, you’ll be fighting for legibility forever.
Practical typography rules I use:
- Start with 16px body text and a line-height of 1.5–1.6. Use rem units so zooming and browser font-size settings work as users expect.
- Headings should scale sensibly—use a clear modular scale so H2s, H3s, and H4s maintain hierarchy without massive jumps.
- Use system stacks or readable web fonts like Inter, Roboto, or Georgia for headings if you want a serif feel. Keep fallback fonts declared.
- Responsive typography: the theme should support fluid type with clamp() or CSS variables so the site doesn’t look like a comic book on desktop or a phone novel on mobile.
Color: your theme should offer color palette presets that meet WCAG contrast. Run contrast checks at normal and large text sizes—remember WCAG allows 3:1 for large text but 4.5:1 for regular body copy. Also make sure states (hover, focus, visited) are distinguishable—don’t rely on color alone. A good test: print the page in grayscale (not literally, but mentally)—if important information vanishes, you’ve got a problem.
Accessibility-friendly features to verify in a theme
Good themes bake accessibility into the structure; bad ones slap on an "accessibility-ready" badge and hope no one looks under the hood. I treat accessibility features like safety rails: they should be visible and testable, not hidden in optimistic marketing copy.
Checklist of features to verify:
- Semantic markup: header, nav, main, article, aside, footer present and used correctly. If a theme uses divs for everything, that’s a red flag.
- Skip-to-content link: a visible link at the top for keyboard users to jump past nav. If you have to squint to find it, it’s not doing its job.
- Keyboard navigation and logical focus order: try tabbing through the page. Can you reach the search, menu, and primary CTAs without a hiccup? Do modals return focus when closed?
- Visible focus indicators: themes that hide the focus ring for aesthetics are prioritizing looks over usability—please don’t be that person.
- ARIA used only where necessary: proper use of roles and aria-labels on custom controls, not as a replacement for correct HTML.
- Alt text conventions: theme shouldn’t force blank alt text everywhere; images should be easy to annotate during upload, and decorative images should accept empty alt attributes.
Quick tests: run the axe or WAVE extension on a demo page, do a keyboard-only browse, and test with a screen reader like NVDA or VoiceOver on a simple article. These checks catch most usability issues quickly. If the theme fails basic keyboard navigation, assume many readers won’t be able to use your site—don’t be the blogger who builds a beautiful site no one can navigate.
Layout and content structure that helps readers
Layout is where your content earns attention or loses it. A content-first theme prioritizes readable column widths, consistent typography across breakpoints, and minimal distractions. If your theme slaps a dozen sidebars, auto-playing carousels, and an announcement bar that never stops yelling, you’ll lose readers faster than free donuts at a diet seminar.
Design choices that help comprehension:
- Content width tuned for line length: aim for the 50–75 character target. Many modern themes let you set a max-width for reading containers—use it.
- Consistent hierarchy: H1 only once, then H2s, H3s. A predictable heading structure helps scanners and screen readers map the article quickly.
- Whitespace and rhythm: generous margins and predictable paragraph spacing reduce cognitive load. Think of whitespace as breathing room, not wasted real estate.
- Responsive grids: a 12-column system is fine, but ensure typography and spacing scale smoothly on mobile—don’t let headlines dwarf the body or squish paragraphs into sardine tins.
- Media handling: captions, transcripts, and meaningful alt text. Videos should include captions and controls that are keyboard operable.
Avoid these traps: auto-playing carousels that steal focus, infinite-scroll setups without location markers, and widgets that inject unrelated content mid-article. Your theme should offer options to disable noisy features. If a single switch hides your entire content area behind an “experience-first” promo, run the other way—experience-first often means reader-last.
How to test a theme before committing
Don’t switch themes on your live site and hope for the best—do it on a staging site like a responsible adult. I set up a clone of my site with the exact plugin stack and real content so the tests reflect production conditions. This is where the rubber meets reality and the theme either behaves or throws a tantrum.
Step-by-step testing workflow:
- Set up a staging clone with SSL and the same plugins. Disable aggressive caching to see true performance.
- Run automated audits: Lighthouse (Performance, Accessibility), axe or WAVE for accessibility inspections, and Theme Check to verify WordPress standards.
- Manual checks: keyboard navigation, skip-to-content behavior, visible focus states, Mobile usability at 100% and 125% zoom.
- Color and contrast tests: run contrast checks on body text, headings, and UI elements. Test dark mode if the theme includes one.
- Screen reader test: fire up NVDA or VoiceOver and read a typical article. Does the reading order make sense? Are headings announced properly?
- Real-user feedback: ask 2–3 friends or followers to poke around on different devices and tell you what’s confusing in 60 seconds or less.
Metrics to log during the demo: LCP, CLS, TBT, and Lighthouse accessibility score. If you see CLS above 0.1 or LCP above 2.5s on a theme demo, it’s not “an occasional hiccup”—it’s baked into how the theme loads. I once tested a gorgeous theme whose demo had a CLS of 0.4; it looked like a magic show where text keeps pulling disappearing acts. Beautiful, if you enjoy chaos.
Practical decision guide: free vs premium themes and how to evaluate
Free themes are like free samples at the grocery store—low risk, useful, and sometimes surprisingly good. Premium themes are like buying the whole gourmet product—nice packaging, support, and updates, but not always necessary. Your choice should hinge on support, update cadence, built-in accessibility, and how much customization you’re willing to do.
How I evaluate them:
- Support: is there active forum help, a ticket system, or documentation? Free themes with active developers and community support can be excellent.
- Updates: check the changelog or the theme’s WordPress.org page. Frequent updates indicate ongoing compatibility and security maintenance.
- Accessibility statements: reputable themes publish an accessibility statement describing what they’ve tested and what they expect site builders to do (like adding alt text). This transparency shows they know what they’re doing.
- Feature parity: list must-haves (skip links, keyboard navigation, color contrast options, responsive typography) and confirm the theme delivers them without plugin hacks.
- Plugin dependency: avoid themes that require many third-party plugins for basic functionality. That’s a future headache when versions drift apart.
Start with a well-maintained free theme if you’re new—WordPress’s default themes and many curated free themes are accessibility-focused and lightweight. Upgrade to premium when you need specific design systems, priority support, or built-in performance tooling. Always check reviews and demo them thoroughly: a perfect demo doesn’t guarantee a perfect match with your content, but it’s a strong signal.
Reusable evaluation checklist and next steps
Here’s the checklist I use every time I vet a theme—copy it, paste it into a note, and run through it on staging. This saves time and prevents painful reversals later. Yes, you could skip it, and yes, you will regret that choice like a tattoo you get at 2 a.m.
- Readability: Base font 16px, line-height 1.5–1.75, line length 50–75 characters.
- Contrast: Body text >= 4.5:1; large text >= 3:1. Check hover/focus states.
- Semantic structure: header, nav, main, footer, article. H1 used once; logical heading order.
- Keyboard: Skip-to-content present and visible; tab order logical; focus indicators visible; no focus traps.
- Performance goals: LCP < 2.5s, CLS < 0.1, low TBT. Run Lighthouse on homepage and a post.
- Accessibility tests: axe/WAVE scan, screen reader pass, manual form label checks, ARIA used properly.
- Media & images: alt text editable, decorative images allowed empty alt, video captions/transcripts supported.
- Plugin dependencies: minimal; core features should not require five extra plugins.
- Support & updates: recent commits, changelog, WordPress.org ratings, accessibility statement present.
- Real-user test: 3 people on different devices try to find and read the latest article—did they succeed within 60 seconds?
Next step: clone your site to a staging environment and run this checklist. If you want a head start, try the WordPress Accessibility Handbook and Google’s Lighthouse docs for guided tests. Link references that I keep handy:
If you’d like, tell me which themes you’re choosing between and I’ll run them through this checklist with targeted notes—think of me as the friend who tells you if those shoes actually make you look like your mom at brunch. Short version: pick clean, readable, accessible, and fast. Your readers (and search engines) will thank you.
