#64371C
Closest named color: Chestnut (#742802). oklch(38.7% 0.075 50), rgb(100, 55, 28).
Aa
White text reads best on this color (9.97:1).
About this color
#64371C is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.075 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.042 away. White text reads best on it, at 9.97:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #64371C |
| RGB | rgb(100, 55, 28) |
| HSL | hsl(23, 56%, 25%) |
| OKLCH | oklch(38.7% 0.075 50) |
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 #64371C | 9.97:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #64371C | 2.10:1 | Fails | Lc 11.1 | Not readable |
| #64371C text on white | 9.97:1 | AAA | Lc 92.9 | Preferred for body text |
| #64371C text on black | 2.10:1 | Fails | Lc -9.6 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F4E7E0
oklch(93.6% 0.017 50.4)
-
Step 200
200
#EBD4C7
oklch(88.5% 0.031 51.5)
-
Step 300
300
#E0B7A0
oklch(81% 0.057 50.9)
-
Step 400
400
#CF906D
oklch(70.8% 0.091 49.8)
-
Step 500
500
#C17345
oklch(63.2% 0.116 50)
-
Step 600
600
#AC5A24
oklch(55.6% 0.126 50.3)
-
Step 700
700
#944917
oklch(49.1% 0.117 49.6)
-
Step 800
800
#783C16
oklch(42.6% 0.097 49.4)
-
Step 900
900 (this color)
#64371C
oklch(38.7% 0.075 50)
-
Step 950
950
#391F10
oklch(27% 0.048 49.7)
#64371C 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) | #443C19 | 0.063 |
| Deuteranopia (no green cones) | #4E461C | 0.058 |
| Tritanopia (no blue cones) | #6E2E31 | 0.047 |
| Achromatopsia (no color) | #424242 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64371C
#64371C
oklch(38.7% 0.075 50)
- #044B65
#044B65
oklch(38.7% 0.076 230.5)
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 #64371C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.042
- Mud Brown #60460F ΔE 0.048
- Purple Brown #673A3F ΔE 0.049
- Reddy Brown #6E1005 ΔE 0.074
- Rust Brown #8B3103 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.079
- Green Brown #544E03 ΔE 0.080
- Brownish Purple #76424E ΔE 0.081
Use #64371C 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.