#643E01
Closest named color: Mud Brown (#60460F). oklch(39.9% 0.086 70.6), rgb(100, 62, 1).
Aa
White text reads best on this color (9.41:1).
About this color
#643E01 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.086 and its hue 71°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.022 away. White text reads best on it, at 9.41:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.23:1 |
| White text | 9.41:1 |
Values
| HEX | #643E01 |
| RGB | rgb(100, 62, 1) |
| HSL | hsl(37, 98%, 20%) |
| OKLCH | oklch(39.9% 0.086 70.6) |
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 #643E01 | 9.41:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #643E01 | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #643E01 text on white | 9.41:1 | AAA | Lc 91.5 | Preferred for body text |
| #643E01 text on black | 2.23:1 | Fails | Lc -10.9 | 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
#F9F5EF
oklch(97.2% 0.009 78.3)
-
Step 100
100
#F2E8DD
oklch(93.6% 0.018 70.2)
-
Step 200
200
#E9D6C0
oklch(88.6% 0.036 71.4)
-
Step 300
300
#DCBA94
oklch(80.9% 0.064 69.8)
-
Step 400
400
#C99555
oklch(70.6% 0.103 70.6)
-
Step 500
500
#BB7913
oklch(63.1% 0.132 70.1)
-
Step 600
600
#9F6500
oklch(55.7% 0.12 70.6)
-
Step 700
700
#865400
oklch(49.1% 0.106 70.2)
-
Step 800
800
#6E4500
oklch(42.8% 0.092 71.2)
-
Step 900
900 (this color)
#643E01
oklch(39.9% 0.086 70.6)
-
Step 950
950
#372103
oklch(27% 0.055 70.4)
#643E01 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) | #4B4100 | 0.048 |
| Deuteranopia (no green cones) | #544A03 | 0.044 |
| Tritanopia (no blue cones) | #6E3434 | 0.070 |
| Achromatopsia (no color) | #464646 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643E01
#643E01
oklch(39.9% 0.086 70.6)
- #1F4A74
#1F4A74
oklch(40.1% 0.086 250.4)
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 #643E01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.022
- Green Brown #544E03 ΔE 0.053
- Chestnut #742802 ΔE 0.060
- Olive Brown #645403 ΔE 0.063
- Milk Chocolate #7F4E1E ΔE 0.073
- Purple Brown #673A3F ΔE 0.075
- Medium Brown #7F5112 ΔE 0.077
- Rust Brown #8B3103 ΔE 0.081
Use #643E01 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.