#643F4E
Closest named color: Purple Brown (#673A3F). oklch(41.6% 0.056 353.9), rgb(100, 63, 78).
Aa
White text reads best on this color (8.88:1).
About this color
#643F4E is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.056 and its hue 354°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.024 away. White text reads best on it, at 8.88:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.056) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #643F4E |
| RGB | rgb(100, 63, 78) |
| HSL | hsl(336, 23%, 32%) |
| OKLCH | oklch(41.6% 0.056 353.9) |
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 #643F4E | 8.88:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #643F4E | 2.36:1 | Fails | Lc 13.7 | Not readable |
| #643F4E text on white | 8.88:1 | AAA | Lc 90.2 | Preferred for body text |
| #643F4E text on black | 2.36:1 | Fails | Lc -12.0 | 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
#EFE7EA
oklch(93.5% 0.01 352.4)
-
Step 200
200
#E4D4DA
oklch(88.5% 0.019 352.7)
-
Step 300
300
#D3B8C2
oklch(80.9% 0.034 353.5)
-
Step 400
400
#BC94A3
oklch(70.8% 0.052 354.1)
-
Step 500
500
#AA798C
oklch(63.1% 0.066 354.1)
-
Step 600
600
#956176
oklch(55.5% 0.073 353.9)
-
Step 700
700
#7F5063
oklch(49% 0.068 354.1)
-
Step 800
800 (this color)
#643F4E
oklch(41.6% 0.056 353.9)
-
Step 900
900
#543843
oklch(37.7% 0.043 354.1)
-
Step 950
950
#312127
oklch(27% 0.027 354.7)
#643F4E 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) | #43464F | 0.060 |
| Deuteranopia (no green cones) | #4C4C4D | 0.055 |
| Tritanopia (no blue cones) | #693E44 | 0.018 |
| Achromatopsia (no color) | #4A4A4A | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F4E
#643F4E
oklch(41.6% 0.056 353.9)
- #275649
#275649
oklch(41.6% 0.056 173.1)
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 #643F4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.024
- Brownish Purple #76424E ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.076
- Dusty Grape #545775 ΔE 0.081
- Dark Mauve #874C62 ΔE 0.082
- Dark Slate Gray #2F4F4F ΔE 0.093
- Dusk #4E5481 ΔE 0.093
- Chestnut #742802 ΔE 0.093
Use #643F4E 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.