#5B3537
Closest named color: Purple Brown (#673A3F). oklch(37.6% 0.055 16.6), rgb(91, 53, 55).
Aa
White text reads best on this color (10.45:1).
About this color
#5B3537 is a dark, muted red. In OKLCH its lightness is 38%, its chroma 0.055 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.031 away. White text reads best on it, at 10.45:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | muted (0.055) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #5B3537 |
| RGB | rgb(91, 53, 55) |
| HSL | hsl(357, 26%, 28%) |
| OKLCH | oklch(37.6% 0.055 16.6) |
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 #5B3537 | 10.45:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #5B3537 | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #5B3537 text on white | 10.45:1 | AAA | Lc 94.1 | Preferred for body text |
| #5B3537 text on black | 2.00:1 | Fails | Lc -8.5 | 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
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F2E7E7
oklch(93.7% 0.012 17.4)
-
Step 200
200
#E8D3D4
oklch(88.4% 0.023 14.3)
-
Step 300
300
#DAB6B7
oklch(80.8% 0.042 16.2)
-
Step 400
400
#C69092
oklch(70.6% 0.066 16.4)
-
Step 500
500
#B77477
oklch(63.1% 0.085 16.8)
-
Step 600
600
#A25C60
oklch(55.6% 0.092 16.8)
-
Step 700
700
#8A4C50
oklch(49.2% 0.084 16.5)
-
Step 800
800
#703E41
oklch(42.6% 0.07 16.6)
-
Step 900
900 (this color)
#5B3537
oklch(37.6% 0.055 16.6)
-
Step 950
950
#361F20
oklch(27% 0.036 16.9)
#5B3537 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) | #3C3B37 | 0.059 |
| Deuteranopia (no green cones) | #454236 | 0.055 |
| Tritanopia (no blue cones) | #623136 | 0.016 |
| Achromatopsia (no color) | #3F3F3F | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3537
#5B3537
oklch(37.6% 0.055 16.6)
- #154A4B
#154A4B
oklch(37.6% 0.054 196.9)
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 #5B3537, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.062
- Chestnut #742802 ΔE 0.071
- Onyx #343A40 ΔE 0.071
- Brownish Purple #76424E ΔE 0.073
- Mud Brown #60460F ΔE 0.082
- Reddy Brown #6E1005 ΔE 0.082
- Claret #680018 ΔE 0.091
Use #5B3537 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.