#12151D
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.017 268.8), rgb(18, 21, 29).
Aa
White text reads best on this color (18.24:1).
About this color
#12151D is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.029 away. White text reads best on it, at 18.24:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.24:1 |
Values
| HEX | #12151D |
| RGB | rgb(18, 21, 29) |
| HSL | hsl(224, 23%, 9%) |
| OKLCH | oklch(19.6% 0.017 268.8) |
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 #12151D | 18.24:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #12151D | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #12151D text on white | 18.24:1 | AAA | Lc 104.9 | Preferred for body text |
| #12151D text on black | 1.15:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BBC0CE
oklch(80.8% 0.02 270.2)
-
Step 400
400
#98A0B5
oklch(70.6% 0.032 269)
-
Step 500
500
#7F89A3
oklch(63.1% 0.041 268.6)
-
Step 600
600
#68738E
oklch(55.6% 0.044 267.6)
-
Step 700
700
#576079
oklch(49.1% 0.042 269.4)
-
Step 800
800
#474F62
oklch(42.8% 0.033 267.1)
-
Step 900
900
#3C4150
oklch(37.7% 0.027 270.6)
-
Step 950
950 (this color)
#12151D
oklch(19.6% 0.017 268.8)
#12151D 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) | #13161D | 0.004 |
| Deuteranopia (no green cones) | #12151D | 0.000 |
| Tritanopia (no blue cones) | #0F1718 | 0.016 |
| Achromatopsia (no color) | #151515 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12151D
#12151D
oklch(19.6% 0.017 268.8)
- #18150C
#18150C
oklch(19.6% 0.018 91.8)
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 #12151D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.029
- Rich Navy #001219 ΔE 0.036
- Almost Black #070D0D ΔE 0.047
- Dark #1B2431 ΔE 0.063
- Jet #212529 ΔE 0.066
- Oxford Blue #1B263B ΔE 0.077
- Very Dark Brown #1D0200 ΔE 0.079
- Navy Blue #001146 ΔE 0.087
Use #12151D 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.