#643D10
Closest named color: Mud Brown (#60460F). oklch(39.8% 0.079 64.9), rgb(100, 61, 16).
Aa
White text reads best on this color (9.47:1).
About this color
#643D10 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.079 and its hue 65°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.027 away. White text reads best on it, at 9.47:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.079) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #643D10 |
| RGB | rgb(100, 61, 16) |
| HSL | hsl(32, 72%, 23%) |
| OKLCH | oklch(39.8% 0.079 64.9) |
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 #643D10 | 9.47:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #643D10 | 2.21:1 | Fails | Lc 12.3 | Not readable |
| #643D10 text on white | 9.47:1 | AAA | Lc 91.7 | Preferred for body text |
| #643D10 text on black | 2.21:1 | Fails | Lc -10.7 | 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
#F9F4F0
oklch(97% 0.008 61.5)
-
Step 100
100
#F2E8DE
oklch(93.6% 0.017 67.6)
-
Step 200
200
#E9D5C3
oklch(88.5% 0.033 64.4)
-
Step 300
300
#DCB999
oklch(80.8% 0.059 64.3)
-
Step 400
400
#CA945F
oklch(70.7% 0.095 64.7)
-
Step 500
500
#BB782D
oklch(63% 0.121 64.9)
-
Step 600
600
#A46100
oklch(55.6% 0.125 64.9)
-
Step 700
700
#8A5100
oklch(49% 0.11 65.1)
-
Step 800
800
#724200
oklch(42.7% 0.096 65.1)
-
Step 900
900 (this color)
#643D10
oklch(39.8% 0.079 64.9)
-
Step 950
950
#372108
oklch(27.1% 0.05 66)
#643D10 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) | #494009 | 0.053 |
| Deuteranopia (no green cones) | #534911 | 0.045 |
| Tritanopia (no blue cones) | #6E3434 | 0.060 |
| Achromatopsia (no color) | #464646 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643D10
#643D10
oklch(39.8% 0.079 64.9)
- #1C4B6F
#1C4B6F
oklch(39.9% 0.079 245)
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 #643D10, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.027
- Chestnut #742802 ΔE 0.054
- Green Brown #544E03 ΔE 0.059
- Purple Brown #673A3F ΔE 0.064
- Olive Brown #645403 ΔE 0.069
- Milk Chocolate #7F4E1E ΔE 0.074
- Rust Brown #8B3103 ΔE 0.079
- Medium Brown #7F5112 ΔE 0.080
Use #643D10 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.