#37030A
Closest named color: Dark Maroon (#3C0008). oklch(21.8% 0.081 19.2), rgb(55, 3, 10).
Aa
White text reads best on this color (17.79:1).
About this color
#37030A is a very dark, moderately saturated red. In OKLCH its lightness is 22%, its chroma 0.081 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Maroon (#3C0008), ΔE 0.012 away. White text reads best on it, at 17.79:1.
| Hue family | Reds |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Dark Maroon (#3C0008) |
| Black text | 1.17:1 |
| White text | 17.79:1 |
Values
| HEX | #37030A |
| RGB | rgb(55, 3, 10) |
| HSL | hsl(352, 90%, 11%) |
| OKLCH | oklch(21.8% 0.081 19.2) |
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 #37030A | 17.79:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #37030A | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #37030A text on white | 17.79:1 | AAA | Lc 103.8 | Preferred for body text |
| #37030A 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
#FCE3E2
oklch(93.6% 0.028 20.4)
-
Step 200
200
#FBCCCB
oklch(88.6% 0.053 19.6)
-
Step 300
300
#F8A8A8
oklch(80.9% 0.095 19.3)
-
Step 400
400
#F1747A
oklch(70.7% 0.154 18.9)
-
Step 500
500
#E74858
oklch(63.1% 0.195 19.2)
-
Step 600
600
#D3183D
oklch(55.6% 0.213 19.3)
-
Step 700
700
#B60030
oklch(49.1% 0.197 19.1)
-
Step 800
800
#940D28
oklch(42.7% 0.164 19.3)
-
Step 900
900
#771925
oklch(37.8% 0.128 19.2)
-
Step 950
950 (this color)
#37030A
oklch(21.8% 0.081 19.2)
#37030A 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) | #12110A | 0.090 |
| Deuteranopia (no green cones) | #201C08 | 0.082 |
| Tritanopia (no blue cones) | #3D0006 | 0.015 |
| Achromatopsia (no color) | #181818 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37030A
#37030A
oklch(21.8% 0.081 19.2)
- #001F21
#001F21
oklch(21.8% 0.037 200.9)
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 #37030A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Maroon #3C0008 ΔE 0.012
- Deep Brown #410200 ΔE 0.030
- Mahogany #4A0100 ΔE 0.049
- Dark Plum #3F012C ΔE 0.065
- Chocolate Brown #411900 ΔE 0.066
- Dark Brown #341C02 ΔE 0.068
- Very Dark Brown #1D0200 ΔE 0.074
- Aubergine #3D0734 ΔE 0.077
Use #37030A 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.