#12131F
Closest named color: Rich Black (#0D1B2A). oklch(19.2% 0.024 280.2), rgb(18, 19, 31).
Aa
White text reads best on this color (18.44:1).
About this color
#12131F is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 18.44:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.44:1 |
Values
| HEX | #12131F |
| RGB | rgb(18, 19, 31) |
| HSL | hsl(235, 27%, 10%) |
| OKLCH | oklch(19.2% 0.024 280.2) |
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 #12131F | 18.44:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #12131F | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #12131F text on white | 18.44:1 | AAA | Lc 105.1 | Preferred for body text |
| #12131F text on black | 1.13:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D7D8E4
oklch(88.5% 0.016 282.2)
-
Step 300
300
#BCBFD3
oklch(80.9% 0.028 279)
-
Step 400
400
#9A9EBD
oklch(70.7% 0.045 279.4)
-
Step 500
500
#8286AD
oklch(63.1% 0.059 280)
-
Step 600
600
#6C6F99
oklch(55.6% 0.065 280.9)
-
Step 700
700
#5A5D82
oklch(49.1% 0.059 280.4)
-
Step 800
800
#494C6A
oklch(42.6% 0.05 279.6)
-
Step 900
900
#3D3F56
oklch(37.6% 0.039 280.5)
-
Step 950
950 (this color)
#12131F
oklch(19.2% 0.024 280.2)
#12131F 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) | #0F1420 | 0.006 |
| Deuteranopia (no green cones) | #0F131F | 0.006 |
| Tritanopia (no blue cones) | #0F1517 | 0.021 |
| Achromatopsia (no color) | #141414 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12131F
#12131F
oklch(19.2% 0.024 280.2)
- #171407
#171407
oklch(19.1% 0.024 97)
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 #12131F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Rich Navy #001219 ΔE 0.036
- Almost Black #070D0D ΔE 0.047
- Dark #1B2431 ΔE 0.067
- Jet #212529 ΔE 0.072
- Very Dark Brown #1D0200 ΔE 0.079
- Dark Navy #000435 ΔE 0.079
- Oxford Blue #1B263B ΔE 0.080
Use #12131F 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.