#18131B
Closest named color: Rich Black (#0D1B2A). oklch(19.7% 0.018 312.7), rgb(24, 19, 27).
Aa
White text reads best on this color (18.29:1).
About this color
#18131B is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 18.29:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.29:1 |
Values
| HEX | #18131B |
| RGB | rgb(24, 19, 27) |
| HSL | hsl(278, 17%, 9%) |
| OKLCH | oklch(19.7% 0.018 312.7) |
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 #18131B | 18.29:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #18131B | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #18131B text on white | 18.29:1 | AAA | Lc 105.0 | Preferred for body text |
| #18131B 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
#EBE9ED
oklch(93.7% 0.006 308.4)
-
Step 200
200
#DCD7DF
oklch(88.5% 0.012 313.2)
-
Step 300
300
#C5BDCA
oklch(80.9% 0.02 312.8)
-
Step 400
400
#A89BB0
oklch(70.7% 0.033 312.8)
-
Step 500
500
#92829C
oklch(63% 0.043 312.5)
-
Step 600
600
#7D6C87
oklch(55.7% 0.046 313)
-
Step 700
700
#695A72
oklch(49.1% 0.042 312.7)
-
Step 800
800
#56495D
oklch(42.6% 0.036 313.7)
-
Step 900
900
#473D4C
oklch(37.6% 0.028 314.5)
-
Step 950
950 (this color)
#18131B
oklch(19.7% 0.018 312.7)
#18131B 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) | #12151B | 0.013 |
| Deuteranopia (no green cones) | #13151B | 0.012 |
| Tritanopia (no blue cones) | #181416 | 0.012 |
| Achromatopsia (no color) | #151515 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18131B
#18131B
oklch(19.7% 0.018 312.7)
- #12170F
#12170F
oklch(19.6% 0.017 133.9)
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 #18131B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Rich Navy #001219 ΔE 0.045
- Almost Black #070D0D ΔE 0.050
- Dark #1B2431 ΔE 0.065
- Jet #212529 ΔE 0.067
- Very Dark Brown #1D0200 ΔE 0.071
- Oxford Blue #1B263B ΔE 0.080
- Very Dark Purple #2A0134 ΔE 0.082
Use #18131B 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.