#643630
Closest named color: Purple Brown (#673A3F). oklch(38.9% 0.067 28.4), rgb(100, 54, 48).
Aa
White text reads best on this color (9.94:1).
About this color
#643630 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.067 and its hue 28°. 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 9.94:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.067) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.11:1 |
| White text | 9.94:1 |
Values
| HEX | #643630 |
| RGB | rgb(100, 54, 48) |
| HSL | hsl(7, 35%, 29%) |
| OKLCH | oklch(38.9% 0.067 28.4) |
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 #643630 | 9.94:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #643630 | 2.11:1 | Fails | Lc 11.1 | Not readable |
| #643630 text on white | 9.94:1 | AAA | Lc 92.8 | Preferred for body text |
| #643630 text on black | 2.11:1 | Fails | Lc -9.6 | 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
#FAF4F3
oklch(97.2% 0.007 28.8)
-
Step 100
100
#F3E6E4
oklch(93.5% 0.014 28)
-
Step 200
200
#EBD3CF
oklch(88.6% 0.027 29)
-
Step 300
300
#DFB5AE
oklch(80.8% 0.05 29.2)
-
Step 400
400
#CE8E84
oklch(70.8% 0.08 29.1)
-
Step 500
500
#C07066
oklch(63.1% 0.103 27.9)
-
Step 600
600
#AB574D
oklch(55.6% 0.112 28.2)
-
Step 700
700
#93473E
oklch(49.2% 0.104 28.4)
-
Step 800
800
#773B33
oklch(42.7% 0.086 29)
-
Step 900
900 (this color)
#643630
oklch(38.9% 0.067 28.4)
-
Step 950
950
#391E1A
oklch(27% 0.043 29.2)
#643630 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) | #413D2F | 0.068 |
| Deuteranopia (no green cones) | #4C462F | 0.063 |
| Tritanopia (no blue cones) | #6D2F35 | 0.027 |
| Achromatopsia (no color) | #434343 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643630
#643630
oklch(38.9% 0.067 28.4)
- #004E58
#004E58
oklch(38.8% 0.067 209.5)
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 #643630, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.024
- Chestnut #742802 ΔE 0.053
- Brownish Purple #76424E ΔE 0.063
- Mud Brown #60460F ΔE 0.069
- Reddy Brown #6E1005 ΔE 0.074
- Charcoal Grey #3C4142 ΔE 0.076
- Red Brown #8B2E16 ΔE 0.081
- Wine Red #7B0323 ΔE 0.084
Use #643630 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.