#000000
#000000 is rgb(0, 0, 0), or hsl(0, 0%, 0%). It exactly matches the sRGB hex approximation of black in the reference Tailwind v4 palette.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 21.00:1 | pass | pass | pass |
| black | 1.00:1 | fail | fail | fail |
| slate-900 | 1.18:1 | fail | fail | fail |
| gray-100 | 19.08:1 | pass | pass | pass |
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 #000000 in real UI palettes
These colors appear alongside #000000 in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #ffffff
Used together in Anti-Design, Bauhaus and 10 more styles.
21.00:1
AA normal text - #ff0000
Used together in Anti-Design, Bauhaus and 4 more styles.
5.25:1
AA normal text - #ffcc00
Used together in Bauhaus, Minimalist Flat and 3 more styles.
13.89:1
AA normal text - #0000ff
Used together in Anti-Design, Bauhaus and 2 more styles.
2.44:1
Not for normal text - #ffff00
Used together in Anti-Design, Geometric Bold and 1 more styles.
19.56:1
AA normal text - #0057b8
Used together in Swiss International, Swiss Poster.
3.06:1
Not for normal text
A readable starting point
white text on #000000: 21.00:1 contrast.
Design styles using this color
- Anti-Designprimary · expressive
- Apple Styleprimary · minimal
- Bauhausprimary · modern
- Brutalist Webprimary · minimal
- Full Page Scrollprimary · expressive
- Fullscreen Herosecondary · expressive
- Geometric Boldprimary · expressive
- Launch Keynoteprimary · modern
- Minimalist Flatprimary · minimal
- Neo-Brutalistprimary · expressive
- Neo-Brutalist Playfulprimary · expressive
- Op Artprimary · expressive
- Swiss Internationalprimary · modern
- Swiss Posterprimary · modern
- VHS Aestheticsecondary · retro
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #000000.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #000000 as the primary color, following the Anti-Design style: rgb(0, 0, 0), nearest Tailwind token black. Keep text contrast at least 4.5:1 (this color scores 21:1 on white, 1:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #000000 with correct contrast constraints. Browse all palette colors.
Questions about #000000
What color is #000000?
#000000 is rgb(0, 0, 0), or hsl(0, 0%, 0%). It exactly matches the sRGB hex approximation of black in the reference Tailwind v4 palette.
What text color should I use on #000000?
White (#ffffff) has the higher black-or-white contrast against #000000: 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 #000000 in Tailwind CSS?
Use bg-[#000000], text-[#000000], 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.