#643620
Closest named color: Chestnut (#742802). oklch(38.6% 0.074 45.4), rgb(100, 54, 32).
Aa
White text reads best on this color (10.04:1).
About this color
#643620 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.074 and its hue 45°. 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 10.04:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.09:1 |
| White text | 10.04:1 |
Values
| HEX | #643620 |
| RGB | rgb(100, 54, 32) |
| HSL | hsl(19, 52%, 26%) |
| OKLCH | oklch(38.6% 0.074 45.4) |
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 #643620 | 10.04:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #643620 | 2.09:1 | Fails | Lc 10.9 | Not readable |
| #643620 text on white | 10.04:1 | AAA | Lc 93.0 | Preferred for body text |
| #643620 text on black | 2.09:1 | Fails | Lc -9.4 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F4E7E1
oklch(93.7% 0.016 46.6)
-
Step 200
200
#ECD3C9
oklch(88.5% 0.031 43.1)
-
Step 300
300
#E0B6A3
oklch(80.9% 0.056 45.6)
-
Step 400
400
#CF8F72
oklch(70.7% 0.088 45.2)
-
Step 500
500
#C1724C
oklch(63.1% 0.113 45.8)
-
Step 600
600
#AD592E
oklch(55.7% 0.123 45.9)
-
Step 700
700
#944821
oklch(49.1% 0.115 45.4)
-
Step 800
800
#783C1D
oklch(42.7% 0.094 46.1)
-
Step 900
900 (this color)
#643620
oklch(38.6% 0.074 45.4)
-
Step 950
950
#391F12
oklch(27.1% 0.046 46.7)
#643620 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) | #423C1E | 0.067 |
| Deuteranopia (no green cones) | #4E4620 | 0.060 |
| Tritanopia (no blue cones) | #6E2D31 | 0.043 |
| Achromatopsia (no color) | #424242 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643620
#643620
oklch(38.6% 0.074 45.4)
- #004C61
#004C61
oklch(38.7% 0.073 224.2)
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 #643620, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.042
- Purple Brown #673A3F ΔE 0.044
- Mud Brown #60460F ΔE 0.054
- Reddy Brown #6E1005 ΔE 0.071
- Brownish Purple #76424E ΔE 0.078
- Red Brown #8B2E16 ΔE 0.078
- Rust Brown #8B3103 ΔE 0.079
- Charcoal Grey #3C4142 ΔE 0.082
Use #643620 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.