#21100C
Closest named color: Very Dark Brown (#1D0200). oklch(19.6% 0.03 34), rgb(33, 16, 12).
Aa
White text reads best on this color (18.35:1).
About this color
#21100C is a very dark, muted red. In OKLCH its lightness is 20%, its chroma 0.030 and its hue 34°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.051 away. White text reads best on it, at 18.35:1.
| Hue family | Reds |
| Lightness | very dark (20%) |
| Chroma | muted (0.030) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.14:1 |
| White text | 18.35:1 |
Values
| HEX | #21100C |
| RGB | rgb(33, 16, 12) |
| HSL | hsl(11, 47%, 9%) |
| OKLCH | oklch(19.6% 0.03 34) |
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 #21100C | 18.35:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #21100C | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #21100C text on white | 18.35:1 | AAA | Lc 104.9 | Preferred for body text |
| #21100C text on black | 1.14:1 | 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
#F9F4F3
oklch(97.1% 0.006 31.1)
-
Step 100
100
#F1E8E5
oklch(93.7% 0.011 39.4)
-
Step 200
200
#E6D5D1
oklch(88.6% 0.02 33.4)
-
Step 300
300
#D7B9B2
oklch(81% 0.036 33.3)
-
Step 400
400
#C19489
oklch(70.6% 0.057 34.1)
-
Step 500
500
#B17A6C
oklch(63.2% 0.073 34.9)
-
Step 600
600
#9C6254
oklch(55.6% 0.079 34.3)
-
Step 700
700
#855145
oklch(49.1% 0.073 33.7)
-
Step 800
800
#6C4239
oklch(42.6% 0.061 32.8)
-
Step 900
900
#583831
oklch(37.6% 0.048 32.9)
-
Step 950
950 (this color)
#21100C
oklch(19.6% 0.03 34)
#21100C 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) | #14120C | 0.029 |
| Deuteranopia (no green cones) | #18160C | 0.028 |
| Tritanopia (no blue cones) | #240D0F | 0.014 |
| Achromatopsia (no color) | #141414 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21100C
#21100C
oklch(19.6% 0.03 34)
- #03191D
#03191D
oklch(19.7% 0.03 210.7)
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 #21100C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.051
- Almost Black #070D0D ΔE 0.059
- Dark Brown #341C02 ΔE 0.066
- Rich Black #0D1B2A ΔE 0.066
- Rich Navy #001219 ΔE 0.067
- Dark Maroon #3C0008 ΔE 0.068
- Jet #212529 ΔE 0.076
- Deep Brown #410200 ΔE 0.077
Use #21100C 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.