#643E28
Closest named color: Purple Brown (#673A3F). oklch(40.3% 0.063 50.3), rgb(100, 62, 40).
Aa
White text reads best on this color (9.28:1).
About this color
#643E28 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.063 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.041 away. White text reads best on it, at 9.28:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.063) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #643E28 |
| RGB | rgb(100, 62, 40) |
| HSL | hsl(22, 43%, 27%) |
| OKLCH | oklch(40.3% 0.063 50.3) |
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 #643E28 | 9.28:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #643E28 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #643E28 text on white | 9.28:1 | AAA | Lc 91.3 | Preferred for body text |
| #643E28 text on black | 2.26:1 | Fails | Lc -11.1 | 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 800.
-
Step 50
50
#F8F4F2
oklch(97% 0.005 48.7)
-
Step 100
100
#F0E8E4
oklch(93.6% 0.01 48.6)
-
Step 200
200
#E5D6CD
oklch(88.6% 0.021 53.2)
-
Step 300
300
#D5BAAC
oklch(80.8% 0.037 49.2)
-
Step 400
400
#C09680
oklch(70.7% 0.06 49)
-
Step 500
500
#AF7C60
oklch(63.1% 0.075 49.7)
-
Step 600
600
#9A6546
oklch(55.6% 0.082 50.7)
-
Step 700
700
#845337
oklch(49.1% 0.078 49.9)
-
Step 800
800 (this color)
#643E28
oklch(40.3% 0.063 50.3)
-
Step 900
900
#573A29
oklch(37.8% 0.05 51.1)
-
Step 950
950
#332218
oklch(27% 0.032 51.4)
#643E28 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) | #494226 | 0.052 |
| Deuteranopia (no green cones) | #524A28 | 0.047 |
| Tritanopia (no blue cones) | #6D3739 | 0.040 |
| Achromatopsia (no color) | #474747 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643E28
#643E28
oklch(40.3% 0.063 50.3)
- #1E4F64
#1E4F64
oklch(40.4% 0.063 229.5)
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 #643E28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.041
- Mud Brown #60460F ΔE 0.041
- Chestnut #742802 ΔE 0.056
- Brownish Purple #76424E ΔE 0.067
- Green Brown #544E03 ΔE 0.073
- Milk Chocolate #7F4E1E ΔE 0.074
- Charcoal Grey #3C4142 ΔE 0.077
- Rust Brown #8B3103 ΔE 0.079
Use #643E28 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.