#6B370B
Closest named color: Chestnut (#742802). oklch(39.6% 0.091 54.7), rgb(107, 55, 11).
Aa
White text reads best on this color (9.64:1).
About this color
#6B370B is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.091 and its hue 55°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.035 away. White text reads best on it, at 9.64:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.17:1 |
| White text | 9.64:1 |
Values
| HEX | #6B370B |
| RGB | rgb(107, 55, 11) |
| HSL | hsl(27, 81%, 23%) |
| OKLCH | oklch(39.6% 0.091 54.7) |
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 #6B370B | 9.64:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #6B370B | 2.17:1 | Fails | Lc 12.0 | Not readable |
| #6B370B text on white | 9.64:1 | AAA | Lc 92.0 | Preferred for body text |
| #6B370B text on black | 2.17:1 | Fails | Lc -10.4 | 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
#FBF4F0
oklch(97.1% 0.009 52.1)
-
Step 100
100
#F5E7DE
oklch(93.7% 0.02 55.1)
-
Step 200
200
#EED3C2
oklch(88.5% 0.038 54.3)
-
Step 300
300
#E4B697
oklch(81% 0.068 55.5)
-
Step 400
400
#D58D5C
oklch(70.6% 0.109 54.2)
-
Step 500
500
#C86F27
oklch(63.1% 0.139 54.8)
-
Step 600
600
#AF5900
oklch(55.7% 0.138 55)
-
Step 700
700
#944A00
oklch(49.2% 0.122 54.7)
-
Step 800
800
#7A3C00
oklch(42.8% 0.106 54.9)
-
Step 900
900 (this color)
#6B370B
oklch(39.6% 0.091 54.7)
-
Step 950
950
#3B1E07
oklch(27% 0.057 55.6)
#6B370B 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) | #463D04 | 0.075 |
| Deuteranopia (no green cones) | #53490A | 0.066 |
| Tritanopia (no blue cones) | #762B2F | 0.060 |
| Achromatopsia (no color) | #454545 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B370B
#6B370B
oklch(39.6% 0.091 54.7)
- #004D6D
#004D6D
oklch(39.7% 0.084 234.8)
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 #6B370B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.035
- Mud Brown #60460F ΔE 0.044
- Purple Brown #673A3F ΔE 0.061
- Rust Brown #8B3103 ΔE 0.065
- Red Brown #8B2E16 ΔE 0.068
- Milk Chocolate #7F4E1E ΔE 0.076
- Reddy Brown #6E1005 ΔE 0.076
- Green Brown #544E03 ΔE 0.077
Use #6B370B 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.