#37171D
Closest named color: Dark Brown (#341C02). oklch(25.4% 0.051 9.6), rgb(55, 23, 29).
Aa
White text reads best on this color (16.11:1).
About this color
#37171D is a dark, muted red. In OKLCH its lightness is 25%, its chroma 0.051 and its hue 10°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Brown (#341C02), ΔE 0.049 away. White text reads best on it, at 16.11:1.
| Hue family | Reds |
| Lightness | dark (25%) |
| Chroma | muted (0.051) |
| Temperature | warm |
| Nearest name | Dark Brown (#341C02) |
| Black text | 1.30:1 |
| White text | 16.11:1 |
Values
| HEX | #37171D |
| RGB | rgb(55, 23, 29) |
| HSL | hsl(349, 41%, 15%) |
| OKLCH | oklch(25.4% 0.051 9.6) |
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 #37171D | 16.11:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #37171D | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #37171D text on white | 16.11:1 | AAA | Lc 102.9 | Preferred for body text |
| #37171D 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
#F5E5E7
oklch(93.5% 0.018 8.8)
-
Step 200
200
#EED0D4
oklch(88.4% 0.034 8.7)
-
Step 300
300
#E5B1B8
oklch(81% 0.061 9.5)
-
Step 400
400
#D58793
oklch(70.7% 0.097 9.8)
-
Step 500
500
#C86779
oklch(63.2% 0.124 9.5)
-
Step 600
600
#B34C62
oklch(55.6% 0.135 9.3)
-
Step 700
700
#9A3C51
oklch(49.1% 0.127 9.3)
-
Step 800
800
#7D3342
oklch(42.8% 0.104 10)
-
Step 900
900
#652D38
oklch(37.7% 0.081 9.5)
-
Step 950
950 (this color)
#37171D
oklch(25.4% 0.051 9.6)
#37171D 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) | #1D1D1D | 0.056 |
| Deuteranopia (no green cones) | #25231C | 0.052 |
| Tritanopia (no blue cones) | #3C1419 | 0.013 |
| Achromatopsia (no color) | #212121 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37171D
#37171D
oklch(25.4% 0.051 9.6)
- #002927
#002927
oklch(25.3% 0.044 189.8)
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 #37171D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Brown #341C02 ΔE 0.049
- Chocolate Brown #411900 ΔE 0.049
- Dark Maroon #3C0008 ΔE 0.050
- Deep Brown #410200 ΔE 0.052
- Jet #212529 ΔE 0.057
- Mahogany #4A0100 ΔE 0.059
- Dark Plum #3F012C ΔE 0.061
- Aubergine #3D0734 ΔE 0.063
Use #37171D 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.