#12181E
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.015 248.6), rgb(18, 24, 30).
Aa
White text reads best on this color (17.87:1).
About this color
#12181E is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.024 away. White text reads best on it, at 17.87:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.87:1 |
Values
| HEX | #12181E |
| RGB | rgb(18, 24, 30) |
| HSL | hsl(210, 25%, 9%) |
| OKLCH | oklch(20.6% 0.015 248.6) |
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 #12181E | 17.87:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #12181E | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #12181E text on white | 17.87:1 | AAA | Lc 104.6 | Preferred for body text |
| #12181E 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
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DADF
oklch(88.5% 0.009 242.9)
-
Step 300
300
#B8C2CC
oklch(80.9% 0.018 248)
-
Step 400
400
#93A3B2
oklch(70.8% 0.028 246.5)
-
Step 500
500
#798C9F
oklch(63.2% 0.036 248.4)
-
Step 600
600
#61768A
oklch(55.6% 0.04 247.3)
-
Step 700
700
#516375
oklch(49.2% 0.036 248.6)
-
Step 800
800
#42515F
oklch(42.8% 0.03 246.7)
-
Step 900
900
#38434E
oklch(37.7% 0.024 248.5)
-
Step 950
950 (this color)
#12181E
oklch(20.6% 0.015 248.6)
#12181E 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) | #16181E | 0.007 |
| Deuteranopia (no green cones) | #14171E | 0.005 |
| Tritanopia (no blue cones) | #0E191A | 0.012 |
| Achromatopsia (no color) | #171717 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12181E
#12181E
oklch(20.6% 0.015 248.6)
- #1C1610
#1C1610
oklch(20.5% 0.015 66.8)
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 #12181E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.024
- Rich Navy #001219 ΔE 0.041
- Dark #1B2431 ΔE 0.054
- Almost Black #070D0D ΔE 0.055
- Jet #212529 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.069
- Dark Brown #341C02 ΔE 0.084
- Very Dark Brown #1D0200 ΔE 0.086
Use #12181E 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.