#12181F
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.017 252.5), rgb(18, 24, 31).
Aa
White text reads best on this color (17.85:1).
About this color
#12181F is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 17.85:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.85:1 |
Values
| HEX | #12181F |
| RGB | rgb(18, 24, 31) |
| HSL | hsl(212, 27%, 10%) |
| OKLCH | oklch(20.6% 0.017 252.5) |
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 #12181F | 17.85:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #12181F | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #12181F text on white | 17.85:1 | AAA | Lc 104.6 | Preferred for body text |
| #12181F text on black | 1.17:1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE0
oklch(88.6% 0.011 247.9)
-
Step 300
300
#B8C2CD
oklch(81% 0.019 250.6)
-
Step 400
400
#93A2B4
oklch(70.6% 0.031 253)
-
Step 500
500
#788BA2
oklch(63% 0.041 253.3)
-
Step 600
600
#61758D
oklch(55.5% 0.044 253.2)
-
Step 700
700
#506278
oklch(49% 0.042 253.7)
-
Step 800
800
#425061
oklch(42.6% 0.033 253.5)
-
Step 900
900
#384350
oklch(37.8% 0.027 252.8)
-
Step 950
950 (this color)
#12181F
oklch(20.6% 0.017 252.5)
#12181F 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) | #15181F | 0.005 |
| Deuteranopia (no green cones) | #14171F | 0.005 |
| Tritanopia (no blue cones) | #0E1A1A | 0.016 |
| Achromatopsia (no color) | #171717 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12181F
#12181F
oklch(20.6% 0.017 252.5)
- #1C160F
#1C160F
oklch(20.5% 0.016 71)
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 #12181F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Rich Navy #001219 ΔE 0.042
- Dark #1B2431 ΔE 0.053
- Almost Black #070D0D ΔE 0.056
- Jet #212529 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.068
- Dark Brown #341C02 ΔE 0.085
- Navy Blue #001146 ΔE 0.086
Use #12181F 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.