#643B4C
Closest named color: Purple Brown (#673A3F). oklch(40.7% 0.062 353.8), rgb(100, 59, 76).
Aa
White text reads best on this color (9.24:1).
About this color
#643B4C is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.062 and its hue 354°. 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 9.24:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.062) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #643B4C |
| RGB | rgb(100, 59, 76) |
| HSL | hsl(335, 26%, 31%) |
| OKLCH | oklch(40.7% 0.062 353.8) |
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 #643B4C | 9.24:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #643B4C | 2.27:1 | Fails | Lc 12.8 | Not readable |
| #643B4C text on white | 9.24:1 | AAA | Lc 91.2 | Preferred for body text |
| #643B4C text on black | 2.27:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E5D4DA
oklch(88.5% 0.02 354.1)
-
Step 300
300
#D5B7C2
oklch(80.8% 0.037 353.9)
-
Step 400
400
#BF92A3
oklch(70.7% 0.059 354.2)
-
Step 500
500
#AE778D
oklch(63.2% 0.075 353.8)
-
Step 600
600
#995F77
oklch(55.7% 0.082 353.7)
-
Step 700
700
#824E64
oklch(49.1% 0.076 353.3)
-
Step 800
800 (this color)
#643B4C
oklch(40.7% 0.062 353.8)
-
Step 900
900
#563743
oklch(37.7% 0.048 354.8)
-
Step 950
950
#332027
oklch(27% 0.031 355.6)
#643B4C 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) | #40434D | 0.066 |
| Deuteranopia (no green cones) | #4A4A4B | 0.062 |
| Tritanopia (no blue cones) | #6A3941 | 0.020 |
| Achromatopsia (no color) | #474747 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B4C
#643B4C
oklch(40.7% 0.062 353.8)
- #1E5547
#1E5547
oklch(40.9% 0.063 173.5)
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 #643B4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.021
- Brownish Purple #76424E ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.077
- Dark Mauve #874C62 ΔE 0.089
- Chestnut #742802 ΔE 0.089
- Dusty Grape #545775 ΔE 0.090
- Onyx #343A40 ΔE 0.091
- Red Purple #820747 ΔE 0.095
Use #643B4C 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.