#21090A
Closest named color: Very Dark Brown (#1D0200). oklch(18.1% 0.042 19.6), rgb(33, 9, 10).
Aa
White text reads best on this color (18.95:1).
About this color
#21090A is a very dark, muted red. In OKLCH its lightness is 18%, its chroma 0.042 and its hue 20°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.034 away. White text reads best on it, at 18.95:1.
| Hue family | Reds |
| Lightness | very dark (18%) |
| Chroma | muted (0.042) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.10:1 |
| White text | 18.95:1 |
Values
| HEX | #21090A |
| RGB | rgb(33, 9, 10) |
| HSL | hsl(357, 57%, 8%) |
| OKLCH | oklch(18.1% 0.042 19.6) |
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 #21090A | 18.95:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #21090A | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #21090A text on white | 18.95:1 | AAA | Lc 105.2 | Preferred for body text |
| #21090A text on black | 1.10:1 | 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
#FAF4F4
oklch(97.2% 0.006 17.3)
-
Step 100
100
#F3E6E6
oklch(93.5% 0.014 17.4)
-
Step 200
200
#EBD2D2
oklch(88.4% 0.028 17.7)
-
Step 300
300
#DFB5B4
oklch(81% 0.049 19.8)
-
Step 400
400
#CD8D8D
oklch(70.7% 0.078 19.2)
-
Step 500
500
#BF7070
oklch(63.2% 0.1 20.3)
-
Step 600
600
#AA5759
oklch(55.7% 0.109 19.7)
-
Step 700
700
#924649
oklch(49.1% 0.103 19.1)
-
Step 800
800
#763A3C
oklch(42.6% 0.084 19.2)
-
Step 900
900
#603233
oklch(37.7% 0.067 19.3)
-
Step 950
950 (this color)
#21090A
oklch(18.1% 0.042 19.6)
#21090A 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) | #0E0D0A | 0.045 |
| Deuteranopia (no green cones) | #151209 | 0.040 |
| Tritanopia (no blue cones) | #250609 | 0.012 |
| Achromatopsia (no color) | #111111 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21090A
#21090A
oklch(18.1% 0.042 19.6)
- #001617
#001617
oklch(18.2% 0.031 198.6)
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 #21090A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.034
- Almost Black #070D0D ΔE 0.059
- Dark Maroon #3C0008 ΔE 0.066
- Rich Navy #001219 ΔE 0.072
- Rich Black #0D1B2A ΔE 0.079
- Deep Brown #410200 ΔE 0.079
- Dark Brown #341C02 ΔE 0.082
- Very Dark Purple #2A0134 ΔE 0.091
Use #21090A 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.