#643B2A
Closest named color: Purple Brown (#673A3F). oklch(39.8% 0.064 43.1), rgb(100, 59, 42).
Aa
White text reads best on this color (9.54:1).
About this color
#643B2A is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.064 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.034 away. White text reads best on it, at 9.54:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.064) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.20:1 |
| White text | 9.54:1 |
Values
| HEX | #643B2A |
| RGB | rgb(100, 59, 42) |
| HSL | hsl(18, 41%, 28%) |
| OKLCH | oklch(39.8% 0.064 43.1) |
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 #643B2A | 9.54:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #643B2A | 2.20:1 | Fails | Lc 12.1 | Not readable |
| #643B2A text on white | 9.54:1 | AAA | Lc 91.9 | Preferred for body text |
| #643B2A text on black | 2.20:1 | Fails | Lc -10.5 | 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
#F3E7E3
oklch(93.6% 0.014 39.4)
-
Step 200
200
#E9D4CB
oklch(88.5% 0.027 44.7)
-
Step 300
300
#DDB7A8
oklch(80.9% 0.049 42.7)
-
Step 400
400
#CA917A
oklch(70.6% 0.077 42.9)
-
Step 500
500
#BB7558
oklch(63.1% 0.098 43.1)
-
Step 600
600
#A75C3D
oklch(55.6% 0.108 42.7)
-
Step 700
700
#8F4C2F
oklch(49.2% 0.1 43.3)
-
Step 800
800
#743E28
oklch(42.6% 0.083 42.4)
-
Step 900
900 (this color)
#643B2A
oklch(39.8% 0.064 43.1)
-
Step 950
950
#372016
oklch(27.1% 0.04 44.1)
#643B2A 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) | #464029 | 0.057 |
| Deuteranopia (no green cones) | #4F492A | 0.055 |
| Tritanopia (no blue cones) | #6D3437 | 0.036 |
| Achromatopsia (no color) | #454545 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B2A
#643B2A
oklch(39.8% 0.064 43.1)
- #154E60
#154E60
oklch(39.6% 0.064 223.4)
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 #643B2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.034
- Mud Brown #60460F ΔE 0.050
- Chestnut #742802 ΔE 0.053
- Brownish Purple #76424E ΔE 0.066
- Charcoal Grey #3C4142 ΔE 0.076
- Red Brown #8B2E16 ΔE 0.079
- Rust Brown #8B3103 ΔE 0.079
- Green Brown #544E03 ΔE 0.082
Use #643B2A 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.