#ff9f0a
#ff9f0a is rgb(255, 159, 10), or hsl(36, 100%, 52%). The nearest reference Tailwind v4 token is amber-500 (#fe9a00), not an exact match.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 2.06:1 | fail | fail | fail |
| black | 10.22:1 | pass | pass | pass |
| slate-900 | 8.68:1 | pass | pass | pass |
| gray-100 | 1.87:1 | fail | fail | fail |
Ratios use WCAG relative luminance for opaque sRGB colors. Normal text requires 4.5:1, or 7:1 at AAA. Large text requires 3:1: at least 24 CSS pixels, or about 18.67 CSS pixels when bold. Pass/fail uses the unrounded ratio. Contrast alone is not a full accessibility assessment.
Colors paired with #ff9f0a in real UI palettes
These colors appear alongside #ff9f0a in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #0a84ff
Used together in macOS Vibrancy.
1.77:1
Not for normal text - #1c1c1e
Used together in macOS Vibrancy.
8.28:1
AA normal text - #30d158
Used together in macOS Vibrancy.
1.02:1
Not for normal text - #3a3a3c
Used together in macOS Vibrancy.
5.52:1
AA normal text - #ff453a
Used together in macOS Vibrancy.
1.66:1
Not for normal text
A readable starting point
black text on #ff9f0a: 10.22:1 contrast.
Design styles using this color
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #ff9f0a.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #ff9f0a as the accent color, following the macOS Vibrancy style: rgb(255, 159, 10), nearest Tailwind token amber-500. Keep text contrast at least 4.5:1 (this color scores 2.06:1 on white, 10.22:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #ff9f0a with correct contrast constraints. Browse all palette colors.
Questions about #ff9f0a
What color is #ff9f0a?
#ff9f0a is rgb(255, 159, 10), or hsl(36, 100%, 52%). The nearest reference Tailwind v4 token is amber-500 (#fe9a00), not an exact match.
What text color should I use on #ff9f0a?
Black (#000000) has the higher black-or-white contrast against #ff9f0a: 10.22:1. This calculation assumes opaque, flat sRGB colors. Normal text requires 4.5:1 and large text 3:1 under WCAG 2.2 SC 1.4.3; it is not a complete accessibility assessment.
How can I use exactly #ff9f0a in Tailwind CSS?
Use bg-[#ff9f0a], text-[#ff9f0a], or a CSS custom property instead of substituting a nearby named token. The reference palette is Tailwind CSS 4.1.18, converted from OKLCH to sRGB hex; newer Tailwind versions and custom themes can differ.
Sources and calculation limits
Reference palette: Tailwind CSS 4.1.18, converted from OKLCH to sRGB hex. Named tokens are versioned approximations; use the exact hex utilities when matching an existing design. Palette pairings come from the linked StyleKit definitions, not external popularity or preference data.