#643F4B
Closest named color: Purple Brown (#673A3F). oklch(41.5% 0.054 358.7), rgb(100, 63, 75).
Aa
White text reads best on this color (8.91:1).
About this color
#643F4B is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.054 and its hue 359°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.020 away. White text reads best on it, at 8.91:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #643F4B |
| RGB | rgb(100, 63, 75) |
| HSL | hsl(341, 23%, 32%) |
| OKLCH | oklch(41.5% 0.054 358.7) |
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 #643F4B | 8.91:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #643F4B | 2.35:1 | Fails | Lc 13.6 | Not readable |
| #643F4B text on white | 8.91:1 | AAA | Lc 90.3 | Preferred for body text |
| #643F4B text on black | 2.35:1 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#EFE7EA
oklch(93.5% 0.01 352.4)
-
Step 200
200
#E4D5D9
oklch(88.6% 0.017 359.3)
-
Step 300
300
#D3B9C0
oklch(81% 0.031 359.7)
-
Step 400
400
#BC94A0
oklch(70.7% 0.051 358.6)
-
Step 500
500
#AB7989
oklch(63.1% 0.066 358.3)
-
Step 600
600
#966272
oklch(55.7% 0.071 359.7)
-
Step 700
700
#7F5160
oklch(49.1% 0.065 358.6)
-
Step 800
800 (this color)
#643F4B
oklch(41.5% 0.054 358.7)
-
Step 900
900
#543841
oklch(37.6% 0.042 358.4)
-
Step 950
950
#322126
oklch(27.1% 0.027 359.8)
#643F4B 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) | #44464B | 0.059 |
| Deuteranopia (no green cones) | #4D4C4A | 0.054 |
| Tritanopia (no blue cones) | #6A3D43 | 0.016 |
| Achromatopsia (no color) | #4A4A4A | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643F4B
#643F4B
oklch(41.5% 0.054 358.7)
- #26554C
#26554C
oklch(41.4% 0.054 179.3)
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 #643F4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.020
- Brownish Purple #76424E ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.074
- Dusty Grape #545775 ΔE 0.083
- Dark Mauve #874C62 ΔE 0.084
- Mud Brown #60460F ΔE 0.088
- Chestnut #742802 ΔE 0.089
- Dark Slate Gray #2F4F4F ΔE 0.092
Use #643F4B 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.