#37100B
Closest named color: Deep Brown (#410200). oklch(23.7% 0.064 29.9), rgb(55, 16, 11).
Aa
White text reads best on this color (16.91:1).
About this color
#37100B is a very dark, muted red. In OKLCH its lightness is 24%, its chroma 0.064 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Deep Brown (#410200), ΔE 0.031 away. White text reads best on it, at 16.91:1.
| Hue family | Reds |
| Lightness | very dark (24%) |
| Chroma | muted (0.064) |
| Temperature | warm |
| Nearest name | Deep Brown (#410200) |
| Black text | 1.24:1 |
| White text | 16.91:1 |
Values
| HEX | #37100B |
| RGB | rgb(55, 16, 11) |
| HSL | hsl(7, 67%, 13%) |
| OKLCH | oklch(23.7% 0.064 29.9) |
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 #37100B | 16.91:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #37100B | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #37100B text on white | 16.91:1 | AAA | Lc 103.5 | Preferred for body text |
| #37100B text on black | 1.24:1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E1
oklch(93.6% 0.022 31.8)
-
Step 200
200
#F4D0C9
oklch(88.6% 0.042 30.9)
-
Step 300
300
#EDAFA4
oklch(80.9% 0.075 30.1)
-
Step 400
400
#E28273
oklch(70.7% 0.121 29.8)
-
Step 500
500
#D75F4E
oklch(63.2% 0.155 30.1)
-
Step 600
600
#C24132
oklch(55.6% 0.168 29.9)
-
Step 700
700
#A73124
oklch(49.1% 0.156 29.9)
-
Step 800
800
#882B20
oklch(42.8% 0.129 30)
-
Step 900
900
#6D281F
oklch(37.7% 0.1 29.9)
-
Step 950
950 (this color)
#37100B
oklch(23.7% 0.064 29.9)
#37100B 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) | #1A170A | 0.067 |
| Deuteranopia (no green cones) | #24200A | 0.061 |
| Tritanopia (no blue cones) | #3D080F | 0.022 |
| Achromatopsia (no color) | #1D1D1D | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37100B
#37100B
oklch(23.7% 0.064 29.9)
- #002429
#002429
oklch(23.8% 0.041 208.4)
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 #37100B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Brown #410200 ΔE 0.031
- Dark Maroon #3C0008 ΔE 0.032
- Dark Brown #341C02 ΔE 0.040
- Chocolate Brown #411900 ΔE 0.041
- Mahogany #4A0100 ΔE 0.046
- Dark Plum #3F012C ΔE 0.074
- Jet #212529 ΔE 0.076
- Aubergine #3D0734 ΔE 0.082
Use #37100B 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.