#21151C
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.023 343.4), rgb(33, 21, 28).
Aa
White text reads best on this color (17.66:1).
About this color
#21151C is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.043 away. White text reads best on it, at 17.66:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.66:1 |
Values
| HEX | #21151C |
| RGB | rgb(33, 21, 28) |
| HSL | hsl(325, 22%, 11%) |
| OKLCH | oklch(21.4% 0.023 343.4) |
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 #21151C | 17.66:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #21151C | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #21151C text on white | 17.66:1 | AAA | Lc 104.4 | Preferred for body text |
| #21151C text on black | 1.18:1 | 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
#F7F4F6
oklch(97% 0.004 337.4)
-
Step 100
100
#EEE8EB
oklch(93.7% 0.008 345.4)
-
Step 200
200
#E1D5DC
oklch(88.5% 0.016 341.4)
-
Step 300
300
#CEBAC5
oklch(80.9% 0.027 343.4)
-
Step 400
400
#B596A8
oklch(70.7% 0.044 342.6)
-
Step 500
500
#A27C92
oklch(63% 0.056 343.2)
-
Step 600
600
#8D657D
oklch(55.6% 0.061 342.6)
-
Step 700
700
#785469
oklch(49.1% 0.057 343.5)
-
Step 800
800
#624556
oklch(42.8% 0.047 343.3)
-
Step 900
900
#503A47
oklch(37.8% 0.037 342.8)
-
Step 950
950 (this color)
#21151C
oklch(21.4% 0.023 343.4)
#21151C 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) | #16171C | 0.023 |
| Deuteranopia (no green cones) | #18191C | 0.022 |
| Tritanopia (no blue cones) | #231517 | 0.011 |
| Achromatopsia (no color) | #191919 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21151C
#21151C
oklch(21.4% 0.023 343.4)
- #0F1D16
#0F1D16
oklch(21.5% 0.024 161.7)
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 #21151C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.054
- Dark #1B2431 ΔE 0.056
- Rich Navy #001219 ΔE 0.066
- Dark Brown #341C02 ΔE 0.068
- Almost Black #070D0D ΔE 0.070
- Oxford Blue #1B263B ΔE 0.071
- Dark Maroon #3C0008 ΔE 0.074
Use #21151C 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.