#18121E
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.025 307), rgb(24, 18, 30).
Aa
White text reads best on this color (18.35:1).
About this color
#18121E is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.037 away. White text reads best on it, at 18.35:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.35:1 |
Values
| HEX | #18121E |
| RGB | rgb(24, 18, 30) |
| HSL | hsl(270, 25%, 9%) |
| OKLCH | oklch(19.6% 0.025 307) |
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 #18121E | 18.35:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #18121E | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #18121E text on white | 18.35:1 | AAA | Lc 105.0 | Preferred for body text |
| #18121E 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EBE8EE
oklch(93.5% 0.009 308.4)
-
Step 200
200
#DCD6E2
oklch(88.4% 0.017 308.2)
-
Step 300
300
#C6BCD0
oklch(81% 0.03 308.1)
-
Step 400
400
#A899B8
oklch(70.6% 0.047 307)
-
Step 500
500
#9380A7
oklch(63.1% 0.061 306.8)
-
Step 600
600
#7D6992
oklch(55.5% 0.066 306.6)
-
Step 700
700
#6A577C
oklch(49% 0.062 307.6)
-
Step 800
800
#564865
oklch(42.7% 0.05 306.4)
-
Step 900
900
#473C52
oklch(37.7% 0.039 307.3)
-
Step 950
950 (this color)
#18121E
oklch(19.6% 0.025 307)
#18121E 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) | #10141E | 0.017 |
| Deuteranopia (no green cones) | #11141E | 0.015 |
| Tritanopia (no blue cones) | #171416 | 0.020 |
| Achromatopsia (no color) | #141414 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18121E
#18121E
oklch(19.6% 0.025 307)
- #12170B
#12170B
oklch(19.5% 0.024 126.9)
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 #18121E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.037
- Rich Navy #001219 ΔE 0.047
- Almost Black #070D0D ΔE 0.053
- Dark #1B2431 ΔE 0.066
- Jet #212529 ΔE 0.070
- Very Dark Brown #1D0200 ΔE 0.073
- Very Dark Purple #2A0134 ΔE 0.076
- Midnight Purple #280137 ΔE 0.077
Use #18121E 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.