#37171A
Closest named color: Dark Brown (#341C02). oklch(25.3% 0.051 15.6), rgb(55, 23, 26).
Aa
White text reads best on this color (16.15:1).
About this color
#37171A is a dark, muted red. In OKLCH its lightness is 25%, its chroma 0.051 and its hue 16°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Brown (#341C02), ΔE 0.044 away. White text reads best on it, at 16.15:1.
| Hue family | Reds |
| Lightness | dark (25%) |
| Chroma | muted (0.051) |
| Temperature | warm |
| Nearest name | Dark Brown (#341C02) |
| Black text | 1.29:1 |
| White text | 16.15:1 |
Values
| HEX | #37171A |
| RGB | rgb(55, 23, 26) |
| HSL | hsl(354, 41%, 15%) |
| OKLCH | oklch(25.3% 0.051 15.6) |
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 #37171A | 16.15:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #37171A | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #37171A text on white | 16.15:1 | AAA | Lc 102.9 | Preferred for body text |
| #37171A text on black | 1.29:1 | 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
#E5B1B4
oklch(80.8% 0.061 14.6)
-
Step 400
400
#D6878C
oklch(70.6% 0.097 15.7)
-
Step 500
500
#C96770
oklch(63.1% 0.124 15.5)
-
Step 600
600
#B44D59
oklch(55.6% 0.134 15.4)
-
Step 700
700
#9B3D49
oklch(49.2% 0.126 15.3)
-
Step 800
800
#7E333C
oklch(42.8% 0.104 15.3)
-
Step 900
900
#652E33
oklch(37.7% 0.079 16)
-
Step 950
950 (this color)
#37171A
oklch(25.3% 0.051 15.6)
#37171A 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) | #1E1D1A | 0.055 |
| Deuteranopia (no green cones) | #262319 | 0.051 |
| Tritanopia (no blue cones) | #3C1318 | 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°).
- #37171A
#37171A
oklch(25.3% 0.051 15.6)
- #002929
#002929
oklch(25.4% 0.043 194.8)
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 #37171A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Brown #341C02 ΔE 0.044
- Chocolate Brown #411900 ΔE 0.044
- Dark Maroon #3C0008 ΔE 0.049
- Deep Brown #410200 ΔE 0.049
- Mahogany #4A0100 ΔE 0.057
- Jet #212529 ΔE 0.058
- Dark Plum #3F012C ΔE 0.065
- Aubergine #3D0734 ΔE 0.068
Use #37171A 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.