#5B370A
Closest named color: Mud Brown (#60460F). oklch(37.2% 0.076 66.2), rgb(91, 55, 10).
Aa
White text reads best on this color (10.52:1).
About this color
#5B370A is a dark, moderately saturated brown. In OKLCH its lightness is 37%, its chroma 0.076 and its hue 66°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.045 away. White text reads best on it, at 10.52:1.
| Hue family | Browns |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.076) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 1.99:1 |
| White text | 10.52:1 |
Values
| HEX | #5B370A |
| RGB | rgb(91, 55, 10) |
| HSL | hsl(33, 80%, 20%) |
| OKLCH | oklch(37.2% 0.076 66.2) |
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 #5B370A | 10.52:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #5B370A | 1.99:1 | Fails | Lc 9.8 | Not readable |
| #5B370A text on white | 10.52:1 | AAA | Lc 94.2 | Preferred for body text |
| #5B370A text on black | 1.99:1 | Fails | Lc -8.4 | 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
#F2E8DF
oklch(93.6% 0.016 64.7)
-
Step 200
200
#E8D6C4
oklch(88.6% 0.031 67.4)
-
Step 300
300
#DBBA9A
oklch(80.9% 0.058 66)
-
Step 400
400
#C89561
oklch(70.7% 0.092 65.9)
-
Step 500
500
#B97A32
oklch(63.2% 0.117 66.1)
-
Step 600
600
#A36200
oklch(55.6% 0.124 66.2)
-
Step 700
700
#895200
oklch(49.1% 0.109 66.6)
-
Step 800
800
#714200
oklch(42.6% 0.095 65.8)
-
Step 900
900 (this color)
#5B370A
oklch(37.2% 0.076 66.2)
-
Step 950
950
#36210A
oklch(26.9% 0.048 65.6)
#5B370A 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) | #433A03 | 0.049 |
| Deuteranopia (no green cones) | #4B420B | 0.043 |
| Tritanopia (no blue cones) | #642E2E | 0.059 |
| Achromatopsia (no color) | #3F3F3F | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B370A
#5B370A
oklch(37.2% 0.076 66.2)
- #184366
#184366
oklch(37.1% 0.077 246.5)
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 #5B370A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.045
- Chestnut #742802 ΔE 0.058
- Green Brown #544E03 ΔE 0.070
- Dark Olive #373E02 ΔE 0.071
- Purple Brown #673A3F ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.082
- Reddy Brown #6E1005 ΔE 0.084
- Olive Brown #645403 ΔE 0.089
Use #5B370A 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.