#18121C
Closest named color: Rich Black (#0D1B2A). oklch(19.4% 0.022 311.5), rgb(24, 18, 28).
Aa
White text reads best on this color (18.38:1).
About this color
#18121C is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 18.38:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.38:1 |
Values
| HEX | #18121C |
| RGB | rgb(24, 18, 28) |
| HSL | hsl(276, 22%, 9%) |
| OKLCH | oklch(19.4% 0.022 311.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #18121C | 18.38:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #18121C | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #18121C text on white | 18.38:1 | AAA | Lc 105.0 | Preferred for body text |
| #18121C text on black | 1.14:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE8ED
oklch(93.5% 0.007 312.3)
-
Step 200
200
#DCD7E0
oklch(88.6% 0.013 310.5)
-
Step 300
300
#C6BCCD
oklch(80.9% 0.026 311.7)
-
Step 400
400
#A99AB4
oklch(70.8% 0.041 311)
-
Step 500
500
#9481A1
oklch(63.1% 0.052 311.5)
-
Step 600
600
#7E6A8C
oklch(55.6% 0.057 311.1)
-
Step 700
700
#6B5877
oklch(49.1% 0.054 312.1)
-
Step 800
800
#574861
oklch(42.7% 0.045 311.6)
-
Step 900
900
#483D4F
oklch(37.9% 0.033 312.2)
-
Step 950
950 (this color)
#18121C
oklch(19.4% 0.022 311.5)
#18121C with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #10141C | 0.017 |
| Deuteranopia (no green cones) | #12141C | 0.013 |
| Tritanopia (no blue cones) | #181315 | 0.016 |
| Achromatopsia (no color) | #141414 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18121C
#18121C
oklch(19.4% 0.022 311.5)
- #11170D
#11170D
oklch(19.5% 0.021 133.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18121C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Rich Navy #001219 ΔE 0.046
- Almost Black #070D0D ΔE 0.050
- Dark #1B2431 ΔE 0.068
- Jet #212529 ΔE 0.070
- Very Dark Brown #1D0200 ΔE 0.070
- Very Dark Purple #2A0134 ΔE 0.079
- Midnight Purple #280137 ΔE 0.080
Use #18121C in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.