#21040C
Closest named color: Very Dark Brown (#1D0200). oklch(17% 0.053 5.7), rgb(33, 4, 12).
Aa
White text reads best on this color (19.31:1).
About this color
#21040C is a very dark, muted red. In OKLCH its lightness is 17%, its chroma 0.053 and its hue 6°. Its hue sits on the warm side of the wheel. The nearest named color is Very Dark Brown (#1D0200), ΔE 0.033 away. White text reads best on it, at 19.31:1.
| Hue family | Reds |
| Lightness | very dark (17%) |
| Chroma | muted (0.053) |
| Temperature | warm |
| Nearest name | Very Dark Brown (#1D0200) |
| Black text | 1.08:1 |
| White text | 19.31:1 |
Values
| HEX | #21040C |
| RGB | rgb(33, 4, 12) |
| HSL | hsl(343, 78%, 7%) |
| OKLCH | oklch(17% 0.053 5.7) |
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 #21040C | 19.31:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #21040C | 1.08:1 | Fails | Lc 0.0 | Not readable |
| #21040C text on white | 19.31:1 | AAA | Lc 105.3 | Preferred for body text |
| #21040C text on black | 1.08:1 | 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
#FBF3F4
oklch(97.1% 0.009 8.5)
-
Step 100
100
#F5E5E8
oklch(93.5% 0.018 4.5)
-
Step 200
200
#EFD0D6
oklch(88.5% 0.036 4.7)
-
Step 300
300
#E5B0BA
oklch(80.8% 0.063 6)
-
Step 400
400
#D68697
oklch(70.8% 0.1 6.1)
-
Step 500
500
#C8657E
oklch(63% 0.128 5.4)
-
Step 600
600
#B44A67
oklch(55.6% 0.14 5.8)
-
Step 700
700
#9A3B56
oklch(49.1% 0.129 5.5)
-
Step 800
800
#7D3146
oklch(42.6% 0.107 5.6)
-
Step 900
900
#652C3B
oklch(37.6% 0.084 5.4)
-
Step 950
950 (this color)
#21040C
oklch(17% 0.053 5.7)
#21040C 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) | #090A0C | 0.060 |
| Deuteranopia (no green cones) | #11100B | 0.054 |
| Tritanopia (no blue cones) | #250207 | 0.014 |
| Achromatopsia (no color) | #0E0E0E | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21040C
#21040C
oklch(17% 0.053 5.7)
- #001411
#001411
oklch(17.2% 0.031 183)
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 #21040C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Very Dark Brown #1D0200 ΔE 0.033
- Almost Black #070D0D ΔE 0.065
- Dark Maroon #3C0008 ΔE 0.069
- Rich Navy #001219 ΔE 0.080
- Very Dark Purple #2A0134 ΔE 0.084
- Deep Brown #410200 ΔE 0.085
- Midnight Purple #280137 ΔE 0.089
- Rich Black #0D1B2A ΔE 0.089
Use #21040C 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.