#643D49
Closest named color: Purple Brown (#673A3F). oklch(41% 0.057 0), rgb(100, 61, 73).
Aa
White text reads best on this color (9.10:1).
About this color
#643D49 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.057 and its hue 0°. 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 9.10:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.057) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.30:1 |
| White text | 9.10:1 |
Values
| HEX | #643D49 |
| RGB | rgb(100, 61, 73) |
| HSL | hsl(342, 24%, 32%) |
| OKLCH | oklch(41% 0.057 0) |
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 #643D49 | 9.10:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #643D49 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #643D49 text on white | 9.10:1 | AAA | Lc 90.8 | Preferred for body text |
| #643D49 text on black | 2.30:1 | Fails | Lc -11.5 | 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
#E4D4D8
oklch(88.4% 0.018 0.4)
-
Step 300
300
#D4B8C0
oklch(80.9% 0.034 358.7)
-
Step 400
400
#BE939F
oklch(70.7% 0.054 0.1)
-
Step 500
500
#AD7888
oklch(63.1% 0.069 359.6)
-
Step 600
600
#976171
oklch(55.6% 0.073 0.5)
-
Step 700
700
#81505F
oklch(49.1% 0.069 0.1)
-
Step 800
800 (this color)
#643D49
oklch(41% 0.057 0)
-
Step 900
900
#553841
oklch(37.7% 0.043 359.2)
-
Step 950
950
#322126
oklch(27.1% 0.027 359.8)
#643D49 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) | #424449 | 0.063 |
| Deuteranopia (no green cones) | #4C4B48 | 0.058 |
| Tritanopia (no blue cones) | #6A3B41 | 0.016 |
| Achromatopsia (no color) | #484848 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643D49
#643D49
oklch(41% 0.057 0)
- #21554B
#21554B
oklch(41.1% 0.058 178.7)
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 #643D49, 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 0.040
- Charcoal Grey #3C4142 ΔE 0.074
- Chestnut #742802 ΔE 0.086
- Dark Mauve #874C62 ΔE 0.087
- Dusty Grape #545775 ΔE 0.089
- Mud Brown #60460F ΔE 0.089
- Onyx #343A40 ΔE 0.091
Use #643D49 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.