#643B4A
Closest named color: Purple Brown (#673A3F). oklch(40.7% 0.061 356.7), rgb(100, 59, 74).
Aa
White text reads best on this color (9.26:1).
About this color
#643B4A is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.061 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.018 away. White text reads best on it, at 9.26:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #643B4A |
| RGB | rgb(100, 59, 74) |
| HSL | hsl(338, 26%, 31%) |
| OKLCH | oklch(40.7% 0.061 356.7) |
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 #643B4A | 9.26:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #643B4A | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #643B4A text on white | 9.26:1 | AAA | Lc 91.2 | Preferred for body text |
| #643B4A text on black | 2.26:1 | Fails | Lc -11.1 | 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
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E5D4D9
oklch(88.5% 0.02 357.7)
-
Step 300
300
#D5B8C1
oklch(81% 0.035 357.2)
-
Step 400
400
#BF92A1
oklch(70.7% 0.058 356.8)
-
Step 500
500
#AE778A
oklch(63.1% 0.073 357)
-
Step 600
600
#995F74
oklch(55.6% 0.08 356.8)
-
Step 700
700
#824E61
oklch(49% 0.074 356.8)
-
Step 800
800 (this color)
#643B4A
oklch(40.7% 0.061 356.7)
-
Step 900
900
#563742
oklch(37.7% 0.047 356.7)
-
Step 950
950
#332027
oklch(27% 0.031 355.6)
#643B4A 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) | #40434B | 0.067 |
| Deuteranopia (no green cones) | #4A4A49 | 0.062 |
| Tritanopia (no blue cones) | #6A3940 | 0.019 |
| Achromatopsia (no color) | #474747 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B4A
#643B4A
oklch(40.7% 0.061 356.7)
- #1D5449
#1D5449
oklch(40.6% 0.061 177.6)
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 #643B4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.018
- Brownish Purple #76424E ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.076
- Chestnut #742802 ΔE 0.087
- Dark Mauve #874C62 ΔE 0.089
- Onyx #343A40 ΔE 0.091
- Dusty Grape #545775 ΔE 0.091
- Mud Brown #60460F ΔE 0.094
Use #643B4A 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.