#643732
Closest named color: Purple Brown (#673A3F). oklch(39.2% 0.065 27.2), rgb(100, 55, 50).
Aa
White text reads best on this color (9.83:1).
About this color
#643732 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.065 and its hue 27°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.021 away. White text reads best on it, at 9.83:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #643732 |
| RGB | rgb(100, 55, 50) |
| HSL | hsl(6, 33%, 29%) |
| OKLCH | oklch(39.2% 0.065 27.2) |
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 #643732 | 9.83:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #643732 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #643732 text on white | 9.83:1 | AAA | Lc 92.6 | Preferred for body text |
| #643732 text on black | 2.13:1 | Fails | Lc -9.8 | 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
#FAF4F3
oklch(97.2% 0.007 28.8)
-
Step 100
100
#F3E6E5
oklch(93.5% 0.014 22.8)
-
Step 200
200
#EBD3CF
oklch(88.6% 0.027 29)
-
Step 300
300
#DFB5B0
oklch(80.9% 0.049 26.1)
-
Step 400
400
#CD8E86
oklch(70.7% 0.078 27.3)
-
Step 500
500
#BF7168
oklch(63.2% 0.1 27.3)
-
Step 600
600
#AA5850
oklch(55.7% 0.109 26.9)
-
Step 700
700
#914840
oklch(49.1% 0.1 27.7)
-
Step 800
800
#763B35
oklch(42.6% 0.084 27.2)
-
Step 900
900 (this color)
#643732
oklch(39.2% 0.065 27.2)
-
Step 950
950
#381E1B
oklch(26.9% 0.041 27.2)
#643732 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) | #413E31 | 0.068 |
| Deuteranopia (no green cones) | #4C4731 | 0.063 |
| Tritanopia (no blue cones) | #6C3136 | 0.023 |
| Achromatopsia (no color) | #434343 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643732
#643732
oklch(39.2% 0.065 27.2)
- #054F57
#054F57
oklch(39.2% 0.065 206.9)
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 #643732, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.021
- Chestnut #742802 ΔE 0.055
- Brownish Purple #76424E ΔE 0.060
- Mud Brown #60460F ΔE 0.069
- Charcoal Grey #3C4142 ΔE 0.075
- Reddy Brown #6E1005 ΔE 0.077
- Red Brown #8B2E16 ΔE 0.081
- Rust Brown #8B3103 ΔE 0.085
Use #643732 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.