#643F47
Closest named color: Purple Brown (#673A3F). oklch(41.3% 0.053 5.5), rgb(100, 63, 71).
Aa
White text reads best on this color (8.95:1).
About this color
#643F47 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.053 and its hue 6°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.016 away. White text reads best on it, at 8.95:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.053) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.34:1 |
| White text | 8.95:1 |
Values
| HEX | #643F47 |
| RGB | rgb(100, 63, 71) |
| HSL | hsl(347, 23%, 32%) |
| OKLCH | oklch(41.3% 0.053 5.5) |
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 #643F47 | 8.95:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #643F47 | 2.34:1 | Fails | Lc 13.5 | Not readable |
| #643F47 text on white | 8.95:1 | AAA | Lc 90.4 | Preferred for body text |
| #643F47 text on black | 2.34:1 | Fails | Lc -11.9 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#F0E7E9
oklch(93.6% 0.01 2)
-
Step 200
200
#E4D5D7
oklch(88.6% 0.017 8.2)
-
Step 300
300
#D3B9BE
oklch(80.9% 0.03 4.7)
-
Step 400
400
#BD949C
oklch(70.7% 0.05 5.4)
-
Step 500
500
#AB7A84
oklch(63.1% 0.063 5.5)
-
Step 600
600
#96626D
oklch(55.5% 0.069 5.7)
-
Step 700
700
#80515B
oklch(49.1% 0.064 5.8)
-
Step 800
800 (this color)
#643F47
oklch(41.3% 0.053 5.5)
-
Step 900
900
#55383E
oklch(37.6% 0.042 5.7)
-
Step 950
950
#322125
oklch(27% 0.027 3.5)
#643F47 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) | #454547 | 0.057 |
| Deuteranopia (no green cones) | #4E4C46 | 0.053 |
| Tritanopia (no blue cones) | #6A3C42 | 0.014 |
| Achromatopsia (no color) | #494949 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F47
#643F47
oklch(41.3% 0.053 5.5)
- #25554F
#25554F
oklch(41.4% 0.053 184.6)
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 #643F47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.016
- Brownish Purple #76424E ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.073
- Mud Brown #60460F ΔE 0.082
- Chestnut #742802 ΔE 0.084
- Dark Mauve #874C62 ΔE 0.086
- Dusty Grape #545775 ΔE 0.087
- Dark Slate Gray #2F4F4F ΔE 0.091
Use #643F47 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.