#21010D
Closest named color: Very Dark Brown (#1D0200). oklch(16.3% 0.062 359.7), rgb(33, 1, 13).
Aa
White text reads best on this color (19.53:1).
About this color
#21010D is a very dark, muted red. In OKLCH its lightness is 16%, its chroma 0.062 and its hue 360°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.037 away. White text reads best on it, at 19.53:1.
| Hue family | Reds |
| Lightness | very dark (16%) |
| Chroma | muted (0.062) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.07:1 |
| White text | 19.53:1 |
Values
| HEX | #21010D |
| RGB | rgb(33, 1, 13) |
| HSL | hsl(338, 94%, 7%) |
| OKLCH | oklch(16.3% 0.062 359.7) |
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 #21010D | 19.53:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #21010D | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #21010D text on white | 19.53:1 | AAA | Lc 105.3 | Preferred for body text |
| #21010D text on black | 1.07:1 | 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
#FCF3F5
oklch(97.2% 0.01 2)
-
Step 100
100
#F7E4E9
oklch(93.5% 0.022 359.7)
-
Step 200
200
#F1CFD8
oklch(88.6% 0.04 0.2)
-
Step 300
300
#E9ADBF
oklch(80.8% 0.074 359.2)
-
Step 400
400
#DC809E
oklch(70.7% 0.118 359.6)
-
Step 500
500
#CF5D86
oklch(63.1% 0.15 359.7)
-
Step 600
600
#BA4070
oklch(55.6% 0.162 359.6)
-
Step 700
700
#A0305E
oklch(49% 0.152 359.3)
-
Step 800
800
#822A4C
oklch(42.7% 0.125 0.1)
-
Step 900
900
#692740
oklch(37.7% 0.098 359.3)
-
Step 950
950 (this color)
#21010D
oklch(16.3% 0.062 359.7)
#21010D 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) | #06080D | 0.071 |
| Deuteranopia (no green cones) | #0F0F0C | 0.064 |
| Tritanopia (no blue cones) | #250005 | 0.020 |
| Achromatopsia (no color) | #0C0C0C | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21010D
#21010D
oklch(16.3% 0.062 359.7)
- #00120E
#00120E
oklch(16.3% 0.03 178.5)
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 #21010D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.037
- Almost Black #070D0D ΔE 0.073
- Dark Maroon #3C0008 ΔE 0.073
- Very Dark Purple #2A0134 ΔE 0.081
- Midnight Purple #280137 ΔE 0.086
- Rich Navy #001219 ΔE 0.088
- Deep Brown #410200 ΔE 0.091
- Dark Plum #3F012C ΔE 0.095
Use #21010D 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.