#643133
Closest named color: Purple Brown (#673A3F). oklch(38.1% 0.074 18.7), rgb(100, 49, 51).
Aa
White text reads best on this color (10.34:1).
About this color
#643133 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.074 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.027 away. White text reads best on it, at 10.34:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.02:1 |
| White text | 10.34:1 |
Values
| HEX | #643133 |
| RGB | rgb(100, 49, 51) |
| HSL | hsl(358, 34%, 29%) |
| OKLCH | oklch(38.1% 0.074 18.7) |
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 #643133 | 10.34:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #643133 | 2.02:1 | Fails | Lc 10.2 | Not readable |
| #643133 text on white | 10.34:1 | AAA | Lc 93.7 | Preferred for body text |
| #643133 text on black | 2.02:1 | Fails | Lc -8.8 | 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
#F4E6E6
oklch(93.6% 0.015 17.4)
-
Step 200
200
#EDD2D1
oklch(88.6% 0.03 20.3)
-
Step 300
300
#E2B3B3
oklch(80.9% 0.055 18.3)
-
Step 400
400
#D28A8B
oklch(70.7% 0.088 18.6)
-
Step 500
500
#C46C6E
oklch(63.1% 0.112 19.3)
-
Step 600
600
#AF5257
oklch(55.6% 0.122 18.6)
-
Step 700
700
#964247
oklch(49.1% 0.113 18.6)
-
Step 800
800
#7A373A
oklch(42.7% 0.094 19.1)
-
Step 900
900 (this color)
#643133
oklch(38.1% 0.074 18.7)
-
Step 950
950
#3A1C1D
oklch(26.9% 0.047 18.6)
#643133 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) | #3C3A33 | 0.079 |
| Deuteranopia (no green cones) | #484432 | 0.074 |
| Tritanopia (no blue cones) | #6D2A32 | 0.023 |
| Achromatopsia (no color) | #404040 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643133
#643133
oklch(38.1% 0.074 18.7)
- #004D4F
#004D4F
oklch(38.1% 0.065 197.8)
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 #643133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.027
- Chestnut #742802 ΔE 0.056
- Brownish Purple #76424E ΔE 0.067
- Reddy Brown #6E1005 ΔE 0.067
- Wine Red #7B0323 ΔE 0.074
- Bordeaux #7B002C ΔE 0.077
- Claret #680018 ΔE 0.079
- Blood #770001 ΔE 0.079
Use #643133 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.