#37171B
Closest named color: Dark Brown (#341C02). oklch(25.3% 0.051 13.6), rgb(55, 23, 27).
Aa
White text reads best on this color (16.14:1).
About this color
#37171B is a dark, muted red. In OKLCH its lightness is 25%, its chroma 0.051 and its hue 14°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Brown (#341C02), ΔE 0.045 away. White text reads best on it, at 16.14:1.
| Hue family | Reds |
| Lightness | dark (25%) |
| Chroma | muted (0.051) |
| Temperature | warm |
| Nearest name | Dark Brown (#341C02) |
| Black text | 1.30:1 |
| White text | 16.14:1 |
Values
| HEX | #37171B |
| RGB | rgb(55, 23, 27) |
| HSL | hsl(353, 41%, 15%) |
| OKLCH | oklch(25.3% 0.051 13.6) |
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 #37171B | 16.14:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #37171B | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #37171B text on white | 16.14:1 | AAA | Lc 102.9 | Preferred for body text |
| #37171B text on black | 1.30:1 | 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
#F5E5E6
oklch(93.5% 0.018 13.1)
-
Step 200
200
#EFD1D2
oklch(88.6% 0.034 15.5)
-
Step 300
300
#E5B1B5
oklch(80.9% 0.061 13.4)
-
Step 400
400
#D6878F
oklch(70.7% 0.097 13.3)
-
Step 500
500
#C96773
oklch(63.1% 0.125 13.6)
-
Step 600
600
#B44D5C
oklch(55.7% 0.134 13.6)
-
Step 700
700
#9A3D4B
oklch(49.1% 0.125 13.8)
-
Step 800
800
#7D333E
oklch(42.7% 0.103 13.4)
-
Step 900
900
#652D35
oklch(37.6% 0.081 12.9)
-
Step 950
950 (this color)
#37171B
oklch(25.3% 0.051 13.6)
#37171B 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) | #1D1D1B | 0.056 |
| Deuteranopia (no green cones) | #25231A | 0.052 |
| Tritanopia (no blue cones) | #3C1319 | 0.014 |
| Achromatopsia (no color) | #212121 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37171B
#37171B
oklch(25.3% 0.051 13.6)
- #002928
#002928
oklch(25.4% 0.044 192.3)
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 #37171B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Brown #341C02 ΔE 0.045
- Chocolate Brown #411900 ΔE 0.046
- Dark Maroon #3C0008 ΔE 0.049
- Deep Brown #410200 ΔE 0.050
- Mahogany #4A0100 ΔE 0.057
- Jet #212529 ΔE 0.058
- Dark Plum #3F012C ΔE 0.064
- Aubergine #3D0734 ΔE 0.066
Use #37171B 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.