#37020B
Closest named color: Dark Maroon (#3C0008). oklch(21.7% 0.082 17.3), rgb(55, 2, 11).
Aa
White text reads best on this color (17.85:1).
About this color
#37020B is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.082 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.013 away. White text reads best on it, at 17.85:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.082) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.17:1 |
| White text | 17.85:1 |
Values
| HEX | #37020B |
| RGB | rgb(55, 2, 11) |
| HSL | hsl(350, 93%, 11%) |
| OKLCH | oklch(21.7% 0.082 17.3) |
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 #37020B | 17.85:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #37020B | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #37020B text on white | 17.85:1 | AAA | Lc 103.8 | Preferred for body text |
| #37020B text on black | 1.17:1 | 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
#FEF2F2
oklch(97.1% 0.013 17.4)
-
Step 100
100
#FCE3E3
oklch(93.6% 0.028 17.7)
-
Step 200
200
#FBCBCC
oklch(88.4% 0.055 16.8)
-
Step 300
300
#F9A7AA
oklch(80.9% 0.097 17)
-
Step 400
400
#F2737C
oklch(70.7% 0.156 17.6)
-
Step 500
500
#E9455C
oklch(63.2% 0.199 17.2)
-
Step 600
600
#D41042
oklch(55.6% 0.217 17.2)
-
Step 700
700
#B50035
oklch(49% 0.196 17.2)
-
Step 800
800
#95072B
oklch(42.8% 0.167 17.5)
-
Step 900
900
#771727
oklch(37.7% 0.129 17.4)
-
Step 950
950 (this color)
#37020B
oklch(21.7% 0.082 17.3)
#37020B 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) | #11100B | 0.093 |
| Deuteranopia (no green cones) | #1F1B09 | 0.083 |
| Tritanopia (no blue cones) | #3D0005 | 0.017 |
| Achromatopsia (no color) | #171717 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37020B
#37020B
oklch(21.7% 0.082 17.3)
- #001F20
#001F20
oklch(21.7% 0.037 197.8)
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 #37020B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.013
- Deep Brown #410200 ΔE 0.032
- Mahogany #4A0100 ΔE 0.051
- Dark Plum #3F012C ΔE 0.063
- Chocolate Brown #411900 ΔE 0.068
- Dark Brown #341C02 ΔE 0.071
- Very Dark Brown #1D0200 ΔE 0.074
- Aubergine #3D0734 ΔE 0.075
Use #37020B 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.