#643C25
Closest named color: Purple Brown (#673A3F). oklch(39.9% 0.067 49.9), rgb(100, 60, 37).
Aa
White text reads best on this color (9.48:1).
About this color
#643C25 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.067 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.042 away. White text reads best on it, at 9.48:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.067) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #643C25 |
| RGB | rgb(100, 60, 37) |
| HSL | hsl(22, 46%, 27%) |
| OKLCH | oklch(39.9% 0.067 49.9) |
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 #643C25 | 9.48:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #643C25 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #643C25 text on white | 9.48:1 | AAA | Lc 91.7 | Preferred for body text |
| #643C25 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F9F4F1
oklch(97% 0.007 53.4)
-
Step 100
100
#F2E7E1
oklch(93.5% 0.014 50.8)
-
Step 200
200
#E9D4C9
oklch(88.4% 0.028 49.6)
-
Step 300
300
#DCB8A4
oklch(80.9% 0.05 50.7)
-
Step 400
400
#CA9274
oklch(70.7% 0.08 49.2)
-
Step 500
500
#BB764F
oklch(63.1% 0.102 49.6)
-
Step 600
600
#A65E32
oklch(55.6% 0.111 50.2)
-
Step 700
700
#8E4D24
oklch(49.1% 0.103 50.4)
-
Step 800
800
#743F20
oklch(42.7% 0.086 49.2)
-
Step 900
900 (this color)
#643C25
oklch(39.9% 0.067 49.9)
-
Step 950
950
#372013
oklch(27% 0.042 49.7)
#643C25 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) | #474023 | 0.056 |
| Deuteranopia (no green cones) | #514925 | 0.050 |
| Tritanopia (no blue cones) | #6D3436 | 0.042 |
| Achromatopsia (no color) | #464646 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643C25
#643C25
oklch(39.9% 0.067 49.9)
- #184E64
#184E64
oklch(39.9% 0.066 229.1)
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 #643C25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.042
- Mud Brown #60460F ΔE 0.043
- Chestnut #742802 ΔE 0.052
- Brownish Purple #76424E ΔE 0.071
- Green Brown #544E03 ΔE 0.075
- Milk Chocolate #7F4E1E ΔE 0.078
- Rust Brown #8B3103 ΔE 0.078
- Charcoal Grey #3C4142 ΔE 0.078
Use #643C25 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.