#643C4E
Closest named color: Purple Brown (#673A3F). oklch(41% 0.062 351.7), rgb(100, 60, 78).
Aa
White text reads best on this color (9.13:1).
About this color
#643C4E is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.062 and its hue 352°. 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 9.13:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.062) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #643C4E |
| RGB | rgb(100, 60, 78) |
| HSL | hsl(333, 25%, 31%) |
| OKLCH | oklch(41% 0.062 351.7) |
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 #643C4E | 9.13:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #643C4E | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #643C4E text on white | 9.13:1 | AAA | Lc 90.9 | Preferred for body text |
| #643C4E text on black | 2.29:1 | Fails | Lc -11.4 | 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
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E4D4DA
oklch(88.5% 0.019 352.7)
-
Step 300
300
#D4B8C3
oklch(81% 0.035 352.2)
-
Step 400
400
#BE92A4
oklch(70.7% 0.058 352.3)
-
Step 500
500
#AD778E
oklch(63.1% 0.074 352.2)
-
Step 600
600
#975F78
oklch(55.5% 0.08 351.7)
-
Step 700
700
#814F65
oklch(49.2% 0.073 352.2)
-
Step 800
800 (this color)
#643C4E
oklch(41% 0.062 351.7)
-
Step 900
900
#563744
oklch(37.8% 0.048 352.9)
-
Step 950
950
#322028
oklch(26.9% 0.031 351.1)
#643C4E 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) | #40444F | 0.066 |
| Deuteranopia (no green cones) | #4A4B4D | 0.062 |
| Tritanopia (no blue cones) | #6A3B42 | 0.022 |
| Achromatopsia (no color) | #484848 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643C4E
#643C4E
oklch(41% 0.062 351.7)
- #215546
#215546
oklch(40.9% 0.061 171.5)
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 #643C4E, 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 0.041
- Charcoal Grey #3C4142 ΔE 0.078
- Dark Mauve #874C62 ΔE 0.086
- Dusty Grape #545775 ΔE 0.086
- Onyx #343A40 ΔE 0.092
- Chestnut #742802 ΔE 0.092
- Dark Grey Blue #29465B ΔE 0.097
Use #643C4E 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.