#6B3437
Closest named color: Purple Brown (#673A3F). oklch(39.8% 0.078 17.9), rgb(107, 52, 55).
Aa
White text reads best on this color (9.67:1).
About this color
#6B3437 is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.078 and its hue 18°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.017 away. White text reads best on it, at 9.67:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #6B3437 |
| RGB | rgb(107, 52, 55) |
| HSL | hsl(357, 35%, 31%) |
| OKLCH | oklch(39.8% 0.078 17.9) |
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 #6B3437 | 9.67:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #6B3437 | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #6B3437 text on white | 9.67:1 | AAA | Lc 92.1 | Preferred for body text |
| #6B3437 text on black | 2.17:1 | Fails | Lc -10.3 | 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
#FBF3F3
oklch(97% 0.009 17.3)
-
Step 100
100
#F5E6E5
oklch(93.7% 0.016 22.1)
-
Step 200
200
#EED1D1
oklch(88.5% 0.033 17.8)
-
Step 300
300
#E4B2B2
oklch(80.9% 0.058 18.4)
-
Step 400
400
#D5888B
oklch(70.7% 0.095 17.2)
-
Step 500
500
#C8696E
oklch(63.2% 0.121 17.8)
-
Step 600
600
#B34F56
oklch(55.7% 0.13 18.1)
-
Step 700
700
#993F46
oklch(49.1% 0.121 18)
-
Step 800
800
#7D343A
oklch(42.7% 0.102 17.4)
-
Step 900
900 (this color)
#6B3437
oklch(39.8% 0.078 17.9)
-
Step 950
950
#3B1C1D
oklch(27% 0.049 18.8)
#6B3437 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) | #403E37 | 0.084 |
| Deuteranopia (no green cones) | #4D4936 | 0.079 |
| Tritanopia (no blue cones) | #742D35 | 0.022 |
| Achromatopsia (no color) | #444444 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B3437
#6B3437
oklch(39.8% 0.078 17.9)
- #005254
#005254
oklch(39.8% 0.068 197.6)
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 #6B3437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.017
- Brownish Purple #76424E ΔE 0.051
- Chestnut #742802 ΔE 0.055
- Red Brown #8B2E16 ΔE 0.072
- Wine Red #7B0323 ΔE 0.073
- Reddy Brown #6E1005 ΔE 0.074
- Bordeaux #7B002C ΔE 0.076
- Rust Brown #8B3103 ΔE 0.079
Use #6B3437 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.