Designers love brand colors. Platforms love system colors. Color Pair Studio reconciles the two—faithfully. Start from a brand hex, get a trustworthy native result that adapts in Light and Dark Mode, passes real contrast checks, and drops into Xcode with autocomplete.

• On-brand: stays true to the designer’s hex

• Native: looks and feels like Apple intended

• Accessible: WCAG-aware with clear pass/fail

Key features

Derived Pair (Pro)
Create a reusable color with Light and Dark twins that read beautifully on their respective backgrounds. Includes a Bias slider to fine-tune brightness balance.

Approximator (Free)
Start from a native base (e.g., .mint, .teal) and dial in modifiers. A More Range toggle gives extra headroom when you need it.

Real accuracy, not vibes
A live ΔE00 (CIEDE2000) difference meter shows how close you are—labeled Very Low / Low / Medium / High. You’ll know when you’ve truly hit it.

Accessibility, built in
Live WCAG contrast badges:

• Text: white-on-color AA check for quick UI overlays

• BG: color-vs-background legibility target (≈3:1) for platform surfaces

One-tap Fix Contrast nudges brightness to pass without destroying your match.

SwiftUI-ready exports

• Copy snippet for quick drop-in usage

• Export to Assets (with clear steps) for a single, named color that autocompletes across your app

Native Mac app, the traditional way
On-device processing, no accounts, no servers. Optional, opt-in anonymous analytics (off by default). Keyboard shortcuts (e.g., ⌘L to toggle Light/Dark preview). Feels right at home.

Who it’s for

• iOS & macOS engineers who want to keep brand intent without fighting Dark Mode

• Product designers working in SwiftUI who need trustworthy platform results

• Indie devs who value clarity, speed, and native quality over heavy tooling

Why it’s better

• Trustworthy by design: quantitative color difference + explicit contrast checks

• Native first: leans on system behaviors that age well with OS updates

• Fast to ship: copy a snippet today; promote to a named asset tomorrow

• Privacy-first: your colors never leave your Mac

Pricing (placeholder)

• Free — Approximator, live ΔE00, WCAG badges, copy snippet

• Pro (in-app upgrade) — Derived Pair generation, per-twin badges, history (coming), quality-of-life extras

(Exact pricing to be announced; join the list for launch discounts.)

FAQ

Does Color Pair Studio send my color data anywhere?
No. All processing is on-device. Analytics are opt-in and anonymous (simple feature counts), and are off by default.

Is this only for SwiftUI?
It’s SwiftUI-first, but the colors you create work anywhere in your project. If you prefer UIColor/NSColor, the same values apply.

How accurate is the match?
We show ΔE00 live. “Very Low” generally means visually indistinguishable in typical UI contexts. When a perfect match would harm readability, we favor accessibility and show you why.

What about contrast?
Badges show both Text (white on color) and BG (color vs platform background). A one-tap Fix Contrast can nudge brightness to meet AA or a 3:1 UI element target.

Will it work offline?
Yes.

macOS version?
macOS 14+ (Apple Silicon recommended). Works with Xcode’s standard asset catalogs.

Are you affiliated with Apple?
No. “Xcode” and “SwiftUI” are Apple trademarks used descriptively.

Technical notes

• Export: Copyable SwiftUI snippets and guided Assets setup for a single, named color with Light/Dark variants

• Preview: App-level Light/Dark toggle (⌘L), live meters for ΔE00 and contrast

• Planned: swatch history, Figma import, auto-tweak suggestions, iCloud sync