#643441
Closest named color: Purple Brown (#673A3F). oklch(39% 0.07 3.5), rgb(100, 52, 65).
Aa
White text reads best on this color (9.95:1).
About this color
#643441 is a dark, moderately saturated red. In OKLCH its lightness is 39%, its chroma 0.070 and its hue 4°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.020 away. White text reads best on it, at 9.95:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.070) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.10:1 |
| White text | 9.95:1 |
Values
| HEX | #643441 |
| RGB | rgb(100, 52, 65) |
| HSL | hsl(344, 32%, 30%) |
| OKLCH | oklch(39% 0.07 3.5) |
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 #643441 | 9.95:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #643441 | 2.10:1 | Fails | Lc 11.1 | Not readable |
| #643441 text on white | 9.95:1 | AAA | Lc 92.9 | Preferred for body text |
| #643441 text on black | 2.10:1 | Fails | Lc -9.6 | 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
#FAF4F5
oklch(97.2% 0.007 5.6)
-
Step 100
100
#F3E6E9
oklch(93.6% 0.015 1.6)
-
Step 200
200
#EBD2D7
oklch(88.6% 0.029 4)
-
Step 300
300
#DFB3BD
oklch(80.9% 0.053 3.1)
-
Step 400
400
#CE8A9B
oklch(70.7% 0.086 3.2)
-
Step 500
500
#BF6C82
oklch(63% 0.108 3.6)
-
Step 600
600
#AA536C
oklch(55.6% 0.117 3.4)
-
Step 700
700
#92435A
oklch(49.1% 0.109 3.6)
-
Step 800
800
#77384A
oklch(42.8% 0.09 3.5)
-
Step 900
900 (this color)
#643441
oklch(39% 0.07 3.5)
-
Step 950
950
#381D24
oklch(27% 0.043 3.7)
#643441 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) | #3C3D41 | 0.077 |
| Deuteranopia (no green cones) | #484640 | 0.071 |
| Tritanopia (no blue cones) | #6B3039 | 0.018 |
| Achromatopsia (no color) | #434343 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643441
#643441
oklch(39% 0.07 3.5)
- #005149
#005149
oklch(39.1% 0.069 183.5)
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 #643441, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.020
- Brownish Purple #76424E ΔE 0.055
- Chestnut #742802 ΔE 0.074
- Charcoal Grey #3C4142 ΔE 0.079
- Merlot #730039 ΔE 0.081
- Bordeaux #7B002C ΔE 0.082
- Wine Red #7B0323 ΔE 0.082
- Reddy Brown #6E1005 ΔE 0.085
Use #643441 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.