#643B11
Closest named color: Mud Brown (#60460F). oklch(39.4% 0.079 61.8), rgb(100, 59, 17).
Aa
White text reads best on this color (9.65:1).
About this color
#643B11 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.079 and its hue 62°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.032 away. White text reads best on it, at 9.65:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.079) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #643B11 |
| RGB | rgb(100, 59, 17) |
| HSL | hsl(30, 71%, 23%) |
| OKLCH | oklch(39.4% 0.079 61.8) |
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 #643B11 | 9.65:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #643B11 | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #643B11 text on white | 9.65:1 | AAA | Lc 92.1 | Preferred for body text |
| #643B11 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
#FAF4F0
oklch(97.1% 0.008 56.3)
-
Step 100
100
#F3E8DE
oklch(93.7% 0.018 64.9)
-
Step 200
200
#EAD5C4
oklch(88.6% 0.033 61.4)
-
Step 300
300
#DDB99A
oklch(80.9% 0.059 62.6)
-
Step 400
400
#CC9361
oklch(70.8% 0.095 61.6)
-
Step 500
500
#BD7731
oklch(63.1% 0.121 62.1)
-
Step 600
600
#A75F00
oklch(55.6% 0.128 62.1)
-
Step 700
700
#8D4F00
oklch(49.1% 0.113 61.8)
-
Step 800
800
#744000
oklch(42.6% 0.098 61.8)
-
Step 900
900 (this color)
#643B11
oklch(39.4% 0.079 61.8)
-
Step 950
950
#382009
oklch(27% 0.051 61.3)
#643B11 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) | #483F0B | 0.056 |
| Deuteranopia (no green cones) | #514811 | 0.050 |
| Tritanopia (no blue cones) | #6E3233 | 0.058 |
| Achromatopsia (no color) | #454545 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B11
#643B11
oklch(39.4% 0.079 61.8)
- #164A6D
#164A6D
oklch(39.3% 0.08 242.6)
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 #643B11, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.032
- Chestnut #742802 ΔE 0.050
- Purple Brown #673A3F ΔE 0.062
- Green Brown #544E03 ΔE 0.065
- Olive Brown #645403 ΔE 0.075
- Milk Chocolate #7F4E1E ΔE 0.078
- Rust Brown #8B3103 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.082
Use #643B11 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.