#251218
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.033 360), rgb(37, 18, 24).
Aa
White text reads best on this color (17.82:1).
About this color
#251218 is a very dark, muted red. In OKLCH its lightness is 21%, its chroma 0.033 and its hue 360°. Its hue sits on the warm side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.056 away. White text reads best on it, at 17.82:1.
| Hue family | Reds |
| Lightness | very dark (21%) |
| Chroma | muted (0.033) |
| Temperature | warm |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.82:1 |
Values
| HEX | #251218 |
| RGB | rgb(37, 18, 24) |
| HSL | hsl(341, 35%, 11%) |
| OKLCH | oklch(21.2% 0.033 360) |
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 #251218 | 17.82:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #251218 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #251218 text on white | 17.82:1 | AAA | Lc 104.5 | Preferred for body text |
| #251218 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
#F9F4F5
oklch(97.1% 0.006 3.3)
-
Step 100
100
#F1E7E9
oklch(93.6% 0.011 3.5)
-
Step 200
200
#E6D4D8
oklch(88.6% 0.021 2.3)
-
Step 300
300
#D7B7BF
oklch(80.9% 0.038 1.2)
-
Step 400
400
#C2919F
oklch(70.7% 0.062 360)
-
Step 500
500
#B27587
oklch(63.1% 0.08 0.4)
-
Step 600
600
#9D5D71
oklch(55.6% 0.087 0.2)
-
Step 700
700
#864C5F
oklch(49.1% 0.082 359.5)
-
Step 800
800
#6D3F4D
oklch(42.7% 0.067 0.7)
-
Step 900
900
#583640
oklch(37.7% 0.051 0.7)
-
Step 950
950 (this color)
#251218
oklch(21.2% 0.033 360)
#251218 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) | #151618 | 0.036 |
| Deuteranopia (no green cones) | #191918 | 0.034 |
| Tritanopia (no blue cones) | #281114 | 0.010 |
| Achromatopsia (no color) | #181818 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #251218
#251218
oklch(21.2% 0.033 360)
- #041E19
#041E19
oklch(21.3% 0.034 178.3)
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 #251218, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.056
- Dark Maroon #3C0008 ΔE 0.062
- Jet #212529 ΔE 0.063
- Dark Brown #341C02 ΔE 0.065
- Dark #1B2431 ΔE 0.066
- Very Dark Brown #1D0200 ΔE 0.069
- Almost Black #070D0D ΔE 0.073
- Deep Brown #410200 ΔE 0.073
Use #251218 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.