#643A29
Closest named color: Purple Brown (#673A3F). oklch(39.5% 0.066 42.6), rgb(100, 58, 41).
Aa
White text reads best on this color (9.63:1).
About this color
#643A29 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.066 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 9.63:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #643A29 |
| RGB | rgb(100, 58, 41) |
| HSL | hsl(17, 42%, 28%) |
| OKLCH | oklch(39.5% 0.066 42.6) |
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 #643A29 | 9.63:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #643A29 | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #643A29 text on white | 9.63:1 | AAA | Lc 92.1 | Preferred for body text |
| #643A29 text on black | 2.17:1 | Fails | Lc -10.3 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F3E7E2
oklch(93.6% 0.015 44.2)
-
Step 200
200
#EAD4CB
oklch(88.6% 0.028 43.6)
-
Step 300
300
#DDB7A8
oklch(80.9% 0.049 42.7)
-
Step 400
400
#CB9179
oklch(70.7% 0.079 43.4)
-
Step 500
500
#BD7457
oklch(63.1% 0.101 42.3)
-
Step 600
600
#A85C3C
oklch(55.7% 0.109 42.9)
-
Step 700
700
#904B2E
oklch(49.1% 0.102 42.7)
-
Step 800
800
#753E27
oklch(42.8% 0.085 42.8)
-
Step 900
900 (this color)
#643A29
oklch(39.5% 0.066 42.6)
-
Step 950
950
#381F16
oklch(27% 0.042 40.5)
#643A29 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) | #453F28 | 0.059 |
| Deuteranopia (no green cones) | #4F4829 | 0.055 |
| Tritanopia (no blue cones) | #6D3336 | 0.035 |
| Achromatopsia (no color) | #454545 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643A29
#643A29
oklch(39.5% 0.066 42.6)
- #124E60
#124E60
oklch(39.6% 0.066 222.7)
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 #643A29, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.034
- Chestnut #742802 ΔE 0.051
- Mud Brown #60460F ΔE 0.051
- Brownish Purple #76424E ΔE 0.067
- Charcoal Grey #3C4142 ΔE 0.077
- Red Brown #8B2E16 ΔE 0.078
- Rust Brown #8B3103 ΔE 0.079
- Reddy Brown #6E1005 ΔE 0.081
Use #643A29 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.