#ffffff
#ffffff is rgb(255, 255, 255), or hsl(0, 0%, 100%). It exactly matches the sRGB hex approximation of white in the reference Tailwind v4 palette.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 1.00:1 | fail | fail | fail |
| black | 21.00:1 | pass | pass | pass |
| slate-900 | 17.85:1 | pass | pass | pass |
| gray-100 | 1.10:1 | 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 #ffffff in real UI palettes
These colors appear alongside #ffffff in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #000000
Used together in Anti-Design, Bauhaus and 10 more styles.
21.00:1
AA normal text - #ffcc00
Used together in Asymmetric Grid, Bauhaus and 5 more styles.
1.51:1
Not for normal text - #ff0000
Used together in Anti-Design, Bauhaus and 4 more styles.
4.00:1
Not for normal text - #0000ff
Used together in Anti-Design, Bauhaus and 2 more styles.
8.59:1
AA normal text - #1a1a1a
Used together in Comic Style, Creative Studio and 2 more styles.
17.40:1
AA normal text - #ff6b6b
Used together in Creative Studio, Fullscreen Hero and 1 more styles.
2.78:1
Not for normal text
A readable starting point
black text on #ffffff: 21.00:1 contrast.
Design styles using this color
- Anti-Designsecondary · expressive
- Asymmetric Gridsecondary · modern
- Bauhaussecondary · modern
- Blueprintprimary · minimal
- Brutalist Websecondary · minimal
- Comic Stylesecondary · expressive
- Creative Studiosecondary · modern
- Dark Gallerysecondary · minimal
- Data Denseprimary · modern
- Distill Stylesecondary · minimal
- Frutiger Aeroaccent · retro
- Full Page Scrollsecondary · expressive
- Fullscreen Heroprimary · expressive
- Geometric Boldsecondary · expressive
- GitHub Stylesecondary · modern
- Glitch Artaccent · expressive
- LaTeX Papersecondary · minimal
- Minimalist Flatsecondary · minimal
- Neo-Brutalistsecondary · expressive
- Neo-Brutalist Playfulsecondary · expressive
- Notion Stylesecondary · minimal
- Op Artsecondary · expressive
- Shopify Cleanprimary · modern
- Split Screensecondary · modern
- Swiss Internationalsecondary · modern
- Swiss Postersecondary · modern
- Z-Pattern Layoutsecondary · modern
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #ffffff.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #ffffff as the secondary color, following the Anti-Design style: rgb(255, 255, 255), nearest Tailwind token white. Keep text contrast at least 4.5:1 (this color scores 1:1 on white, 21:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #ffffff with correct contrast constraints. Browse all palette colors.
Questions about #ffffff
What color is #ffffff?
#ffffff is rgb(255, 255, 255), or hsl(0, 0%, 100%). It exactly matches the sRGB hex approximation of white in the reference Tailwind v4 palette.
What text color should I use on #ffffff?
Black (#000000) has the higher black-or-white contrast against #ffffff: 21.00:1. 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 #ffffff in Tailwind CSS?
Use bg-[#ffffff], text-[#ffffff], 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.