#210904
Closest named color: Very Dark Brown (#1D0200). oklch(17.9% 0.044 36.3), rgb(33, 9, 4).
Aa
White text reads best on this color (18.99:1).
About this color
#210904 is a very dark, muted red. In OKLCH its lightness is 18%, its chroma 0.044 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.029 away. White text reads best on it, at 18.99:1.
| Hue family | Reds |
| Lightness | very dark (18%) |
| Chroma | muted (0.044) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.10:1 |
| White text | 18.99:1 |
Values
| HEX | #210904 |
| RGB | rgb(33, 9, 4) |
| HSL | hsl(10, 78%, 7%) |
| OKLCH | oklch(17.9% 0.044 36.3) |
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 #210904 | 18.99:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #210904 | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #210904 text on white | 18.99:1 | AAA | Lc 105.2 | Preferred for body text |
| #210904 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F4E7E3
oklch(93.7% 0.015 37.9)
-
Step 200
200
#EBD3CC
oklch(88.5% 0.029 36.9)
-
Step 300
300
#E0B6AA
oklch(81% 0.052 36.5)
-
Step 400
400
#CE8E7C
oklch(70.6% 0.083 36.4)
-
Step 500
500
#C0715B
oklch(63% 0.106 36.4)
-
Step 600
600
#AB5841
oklch(55.5% 0.115 36.4)
-
Step 700
700
#934833
oklch(49.2% 0.107 36.6)
-
Step 800
800
#773B2B
oklch(42.6% 0.088 35.9)
-
Step 900
900
#613327
oklch(37.7% 0.07 35.6)
-
Step 950
950 (this color)
#210904
oklch(17.9% 0.044 36.3)
#210904 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) | #0F0D04 | 0.044 |
| Deuteranopia (no green cones) | #151204 | 0.039 |
| Tritanopia (no blue cones) | #250508 | 0.019 |
| Achromatopsia (no color) | #101010 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #210904
#210904
oklch(17.9% 0.044 36.3)
- #00151A
#00151A
oklch(18% 0.032 213.8)
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 #210904, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.029
- Almost Black #070D0D ΔE 0.059
- Dark Maroon #3C0008 ΔE 0.068
- Rich Navy #001219 ΔE 0.076
- Deep Brown #410200 ΔE 0.078
- Dark Brown #341C02 ΔE 0.079
- Rich Black #0D1B2A ΔE 0.085
- Chocolate Brown #411900 ΔE 0.096
Use #210904 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.