#00d9ff
#00d9ff is rgb(0, 217, 255), or hsl(189, 100%, 50%). The nearest reference Tailwind v4 token is cyan-400 (#00d3f2), not an exact match.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 1.70:1 | fail | fail | fail |
| black | 12.37:1 | pass | pass | pass |
| slate-900 | 10.52:1 | pass | pass | pass |
| gray-100 | 1.54:1 | 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 #00d9ff in real UI palettes
These colors appear alongside #00d9ff in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #000000
Used together in Neo-Brutalist.
12.37:1
AA normal text - #ccff00
Used together in Neo-Brutalist.
1.44:1
Not for normal text - #ff006e
Used together in Neo-Brutalist.
2.26:1
Not for normal text - #ff9500
Used together in Neo-Brutalist.
1.30:1
Not for normal text - #ffffff
Used together in Neo-Brutalist.
1.70:1
Not for normal text
A readable starting point
black text on #00d9ff: 12.37:1 contrast.
Design styles using this color
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #00d9ff.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #00d9ff as the accent color, following the Neo-Brutalist style: rgb(0, 217, 255), nearest Tailwind token cyan-400. Keep text contrast at least 4.5:1 (this color scores 1.7:1 on white, 12.37:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #00d9ff with correct contrast constraints. Browse all palette colors.
Questions about #00d9ff
What color is #00d9ff?
#00d9ff is rgb(0, 217, 255), or hsl(189, 100%, 50%). The nearest reference Tailwind v4 token is cyan-400 (#00d3f2), not an exact match.
What text color should I use on #00d9ff?
Black (#000000) has the higher black-or-white contrast against #00d9ff: 12.37:1. 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 #00d9ff in Tailwind CSS?
Use bg-[#00d9ff], text-[#00d9ff], 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.