# Letterproof: Color Contrast — Proof light and dark themes > Proof light and dark themes (iPhone/iPad app by Robert Corbin.) - Source: https://appshunter.io/ios/app/letterproof-color-contrast/id6776838156 (this page in markdown: same URL + `.md`) - Developer: [Robert Corbin](https://appshunter.io/developer/1890247992) - Category: Graphics & Design, Utilities - Price: $2.99 - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Languages: American English - Released: 2026-06-09 - Data updated: 2026-10-16 ## What is Letterproof? Audit named design roles in light and dark themes, preserve a baseline, create a high-contrast variant, and export exact color tokens alongside an auditable report. HOW IT WORKS 1. Open Palette, then Theme Proof. Define up to 30 roles with light/dark foreground and background hex values, or load the example themes. 2. Choose normal text, large text or UI component for each role and audit both themes. Filter pairs needing review and inspect their exact ratios. 3. Save a baseline, create a contrast variant, and save it separately. Export the report or color-token JSON and reopen saved proofs after relaunch. Camera/image audits, manual checks, palette matrices, history and existing tools remain available. Contrast calculations use the current WCAG relative-luminance formula. WHAT TO KNOW This checks opaque sRGB color pairs against selected WCAG 2.2 AA thresholds, not complete accessibility compliance. Normal text uses 4.5:1; large text and essential UI boundaries use 3:1. Large text is at least 18 pt regular or 14 pt bold. Choose the correct role and adjacent background. Transparency, gradients, inactive controls, exceptions and actual rendering need separate review. Variants offer black/white foreground alternatives, not nearest-brand colors. iPhone and iPad. ## Is Letterproof safe? Not enough ratings yet to assess Letterproof. ## Is Letterproof legit? Letterproof: Color Contrast appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Letterproof is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 5 releases) ### 2.0.1 — 2026-09-30 A clearer App Store name and search details. No other changes in this update. ### 2.0 — 2026-09-15 Theme Proof Audit named design roles in light and dark themes, preserve a baseline, create a high-contrast variant, and export exact color tokens alongside an auditable report. 1. Open Palette, then Theme Proof. Define up to 30 roles with light/dark foreground and background hex values, or load the example themes. 2. Choose normal text, large text or UI component for each role and audit both themes. Filter pairs needing review and inspect their exact ratios. 3. Save a baseline, create a contrast variant, and save it separately. Export the report or color-token JSON and reopen saved proofs after relaunch. This checks opaque sRGB color pairs against selected WCAG 2.2 AA thresholds, not complete accessibility compliance. Normal text uses 4.5:1; large text and essential UI boundaries use 3:1. Large text is at least 18 pt regular or 14 pt bold. Choose the correct role and adjacent background. Transparency, gradients, inactive controls, exceptions and actual rendering need separate review. Variants offer black/white foreground alternatives, not nearest-brand colors. ### 1.4.1 — 2026-06-26 This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged. ### 1.4 — 2026-06-23 What's New in Letterproof 1.4 Palette Contrast Matrix - the new Palette tab lets you enter your entire design-system colour palette (up to 12 colours) and see an NN compliance grid in one view. Every text/background combination is scored simultaneously: each cell shows the WCAG grade (AAA/AA/FAIL) and the contrast ratio right on the coloured background, so failing pairs are visible at a glance. Toggle to large-text thresholds with one tap. Tap any cell for a full detail sheet: contrast bar, APCA Lc score, colour-fix suggestions, and colour-blindness simulations. Share the full matrix as a plain-text report. The palette is saved between sessions. Bold-text threshold - WCAG 1.4.3 defines large text as 18 pt regular *or* 14 pt bold, but Letterproof previously applied only the 18 pt boundary (the conservative fallback when weight isn't detectable from pixels). A new `isLargeTextSize(_:isBold:)` API now supports both boundaries. The Manual tab's large-text toggle label clarifies the 18 pt regular / 14 pt bold distinction, and the ReadingDetailSheet explanation text references the bold rule. ### 1.3 — 2026-06-18 Export a shareable Accessibility Report — a polished PDF (and annotated PNG) of any audit, ready to drop into a compliance ticket, parent-teacher packet, or client deliverable. Plus contrast-accuracy and overlay-alignment fixes for portrait camera photos and wide-gamut images. ## Apps similar to Letterproof | App | Rating | Price | Category | | --- | --- | --- | --- | | [FlipBook - Video to Frames](https://appshunter.io/ios/app/flipbook-video-to-frames/id6758916313) | 4.6 (9) | Free | Graphics & Design | | [AI Photo Editor Object Remover](https://appshunter.io/ios/app/ai-photo-editor-object-remover/id6762709553) | 5.0 (3) | Free | Graphics & Design | | [Object Removal: AI Smart Erase](https://appshunter.io/ios/app/object-removal-ai-smart-erase/id6760606547) | 4.3 (9) | Free | Graphics & Design | | [Resize Video](https://appshunter.io/ios/app/resize-video/id6504019810) | 4.8 (71) | $2.99 | Graphics & Design | | [WatermarkX - Markup photos app](https://appshunter.io/ios/app/watermarkx-markup-photos-app/id6504436456) | 4.6 (9) | Free | Graphics & Design | | [Paint.Ms](https://appshunter.io/ios/app/paintms/id1619725004) | 4.0 (1) | Free | Graphics & Design | ## More apps by Robert Corbin - [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266) - [Hush Secret Text: Encryption](https://appshunter.io/ios/app/hush-secret-text-encryption/id6761658175) - [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447) - [Receipt to PDF: Expense Report](https://appshunter.io/ios/app/receipt-to-pdf-expense-report/id6761782025) - [Route Your Pay: Mileage Log](https://appshunter.io/ios/app/route-your-pay-mileage-log/id6761783719) - [Tip Arbiter: Tip Calculator](https://appshunter.io/ios/app/tip-arbiter-tip-calculator/id6761786879) All apps by Robert Corbin: https://appshunter.io/developer/1890247992 ## Related topics [color contrast](https://appshunter.io/ios/topics/color-contrast) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-16.*