#643550
Closest named color: Purple Brown (#673A3F). oklch(39.8% 0.077 345.7), rgb(100, 53, 80).
Aa
White text reads best on this color (9.69:1).
About this color
#643550 is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.077 and its hue 346°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.036 away. White text reads best on it, at 9.69:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.16:1 |
| White text | 9.69:1 |
Values
| HEX | #643550 |
| RGB | rgb(100, 53, 80) |
| HSL | hsl(326, 31%, 30%) |
| OKLCH | oklch(39.8% 0.077 345.7) |
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 #643550 | 9.69:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #643550 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #643550 text on white | 9.69:1 | AAA | Lc 92.2 | Preferred for body text |
| #643550 text on black | 2.16:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#FAF3F6
oklch(97% 0.008 349.2)
-
Step 100
100
#F3E6EC
oklch(93.7% 0.016 347.6)
-
Step 200
200
#EAD1DE
oklch(88.5% 0.033 345)
-
Step 300
300
#DDB2C9
oklch(80.9% 0.058 345.1)
-
Step 400
400
#CB89AD
oklch(70.7% 0.093 345.9)
-
Step 500
500
#BB6B99
oklch(63.1% 0.116 345.4)
-
Step 600
600
#A65183
oklch(55.5% 0.127 345.7)
-
Step 700
700
#8F416F
oklch(49.1% 0.119 346)
-
Step 800
800
#74365B
oklch(42.7% 0.099 345.3)
-
Step 900
900 (this color)
#643550
oklch(39.8% 0.077 345.7)
-
Step 950
950
#371C2C
oklch(27% 0.049 344.5)
#643550 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) | #394051 | 0.081 |
| Deuteranopia (no green cones) | #45474F | 0.073 |
| Tritanopia (no blue cones) | #6A353F | 0.031 |
| Achromatopsia (no color) | #444444 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643550
#643550
oklch(39.8% 0.077 345.7)
- #0E543D
#0E543D
oklch(39.8% 0.077 165.5)
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 #643550, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.036
- Brownish Purple #76424E ΔE 0.054
- Grape Purple #5D1451 ΔE 0.077
- Velvet #750851 ΔE 0.079
- Merlot #730039 ΔE 0.083
- Red Purple #820747 ΔE 0.084
- Wine #80013F ΔE 0.086
- Charcoal Grey #3C4142 ΔE 0.086
Use #643550 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.