#55370B
Closest named color: Mud Brown (#60460F). oklch(36.4% 0.071 71.4), rgb(85, 55, 11).
Aa
White text reads best on this color (10.83:1).
About this color
#55370B is a dark, moderately saturated brown. In OKLCH its lightness is 36%, its chroma 0.071 and its hue 71°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.050 away. White text reads best on it, at 10.83:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.071) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 1.93:1 |
| White text | 10.83:1 |
Values
| HEX | #55370B |
| RGB | rgb(85, 55, 11) |
| HSL | hsl(36, 77%, 19%) |
| OKLCH | oklch(36.4% 0.071 71.4) |
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 #55370B | 10.83:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #55370B | 1.93:1 | Fails | Lc 9.0 | Not readable |
| #55370B text on white | 10.83:1 | AAA | Lc 94.9 | Preferred for body text |
| #55370B text on black | 1.93:1 | Fails | Lc -7.7 | 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 900.
-
Step 50
50
#F9F5F0
oklch(97.2% 0.008 73.7)
-
Step 100
100
#F1E8DF
oklch(93.6% 0.016 67.6)
-
Step 200
200
#E6D6C5
oklch(88.4% 0.029 69.1)
-
Step 300
300
#D7BC9C
oklch(81% 0.053 71.7)
-
Step 400
400
#C29864
oklch(70.7% 0.085 71.7)
-
Step 500
500
#B27D37
oklch(63% 0.108 71)
-
Step 600
600
#9D6605
oklch(55.6% 0.118 72)
-
Step 700
700
#855500
oklch(49.1% 0.105 71.8)
-
Step 800
800
#6D4502
oklch(42.6% 0.091 71.6)
-
Step 900
900 (this color)
#55370B
oklch(36.4% 0.071 71.4)
-
Step 950
950
#34220B
oklch(26.9% 0.045 70.4)
#55370B 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) | #413904 | 0.040 |
| Deuteranopia (no green cones) | #48400C | 0.035 |
| Tritanopia (no blue cones) | #5D2F2E | 0.058 |
| Achromatopsia (no color) | #3D3D3D | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55370B
#55370B
oklch(36.4% 0.071 71.4)
- #204062
#204062
oklch(36.4% 0.07 251.6)
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 #55370B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.050
- Dark Olive #373E02 ΔE 0.061
- Chestnut #742802 ΔE 0.068
- Green Brown #544E03 ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.076
- Purple Brown #673A3F ΔE 0.078
- Pakistan Green #283618 ΔE 0.081
- Onyx #343A40 ΔE 0.086
Use #55370B 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.