#643C27
Closest named color: Purple Brown (#673A3F). oklch(39.9% 0.065 47.9), rgb(100, 60, 39).
Aa
White text reads best on this color (9.47:1).
About this color
#643C27 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.065 and its hue 48°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.039 away. White text reads best on it, at 9.47:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #643C27 |
| RGB | rgb(100, 60, 39) |
| HSL | hsl(21, 44%, 27%) |
| OKLCH | oklch(39.9% 0.065 47.9) |
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 #643C27 | 9.47:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #643C27 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #643C27 text on white | 9.47:1 | AAA | Lc 91.7 | Preferred for body text |
| #643C27 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
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F2E7E2
oklch(93.5% 0.014 46.2)
-
Step 200
200
#E9D4CA
oklch(88.4% 0.027 47.2)
-
Step 300
300
#DCB8A6
oklch(80.9% 0.049 48.1)
-
Step 400
400
#CA9276
oklch(70.7% 0.079 47.6)
-
Step 500
500
#BB7652
oklch(63.1% 0.101 47.9)
-
Step 600
600
#A65E36
oklch(55.7% 0.109 48.3)
-
Step 700
700
#8E4D28
oklch(49.1% 0.101 48.5)
-
Step 800
800
#743F23
oklch(42.7% 0.085 47.2)
-
Step 900
900 (this color)
#643C27
oklch(39.9% 0.065 47.9)
-
Step 950
950
#372014
oklch(27% 0.041 48)
#643C27 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) | #474125 | 0.056 |
| Deuteranopia (no green cones) | #504927 | 0.051 |
| Tritanopia (no blue cones) | #6D3537 | 0.039 |
| Achromatopsia (no color) | #464646 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643C27
#643C27
oklch(39.9% 0.065 47.9)
- #184E63
#184E63
oklch(39.9% 0.065 227.9)
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 #643C27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.039
- Mud Brown #60460F ΔE 0.045
- Chestnut #742802 ΔE 0.053
- Brownish Purple #76424E ΔE 0.069
- Green Brown #544E03 ΔE 0.076
- Charcoal Grey #3C4142 ΔE 0.077
- Milk Chocolate #7F4E1E ΔE 0.078
- Rust Brown #8B3103 ΔE 0.079
Use #643C27 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.