#642D37
Closest named color: Purple Brown (#673A3F). oklch(37.5% 0.08 10.3), rgb(100, 45, 55).
Aa
White text reads best on this color (10.64:1).
About this color
#642D37 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.080 and its hue 10°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.034 away. White text reads best on it, at 10.64:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.080) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 1.97:1 |
| White text | 10.64:1 |
Values
| HEX | #642D37 |
| RGB | rgb(100, 45, 55) |
| HSL | hsl(349, 38%, 28%) |
| OKLCH | oklch(37.5% 0.08 10.3) |
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 #642D37 | 10.64:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #642D37 | 1.97:1 | Fails | Lc 9.6 | Not readable |
| #642D37 text on white | 10.64:1 | AAA | Lc 94.3 | Preferred for body text |
| #642D37 text on black | 1.97:1 | Fails | Lc -8.3 | 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
#FBF3F4
oklch(97.1% 0.009 8.5)
-
Step 100
100
#F5E5E7
oklch(93.5% 0.018 8.8)
-
Step 200
200
#EED1D4
oklch(88.6% 0.033 10.7)
-
Step 300
300
#E4B1B7
oklch(80.8% 0.06 10.6)
-
Step 400
400
#D58792
oklch(70.7% 0.096 10.6)
-
Step 500
500
#C76778
oklch(63% 0.123 10)
-
Step 600
600
#B24D61
oklch(55.6% 0.132 10.2)
-
Step 700
700
#993D50
oklch(49% 0.124 10.2)
-
Step 800
800
#7C3342
oklch(42.6% 0.102 9.8)
-
Step 900
900 (this color)
#642D37
oklch(37.5% 0.08 10.3)
-
Step 950
950
#3B1B21
oklch(27% 0.051 9.1)
#642D37 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) | #383837 | 0.087 |
| Deuteranopia (no green cones) | #464236 | 0.080 |
| Tritanopia (no blue cones) | #6C2731 | 0.020 |
| Achromatopsia (no color) | #3E3E3E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642D37
#642D37
oklch(37.5% 0.08 10.3)
- #004C49
#004C49
oklch(37.6% 0.065 190.2)
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 #642D37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.034
- Chestnut #742802 ΔE 0.064
- Reddy Brown #6E1005 ΔE 0.067
- Wine Red #7B0323 ΔE 0.068
- Bordeaux #7B002C ΔE 0.069
- Merlot #730039 ΔE 0.070
- Brownish Purple #76424E ΔE 0.071
- Claret #680018 ΔE 0.072
Use #642D37 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.