#642D40
Closest named color: Purple Brown (#673A3F). oklch(37.8% 0.082 360), rgb(100, 45, 64).
Aa
White text reads best on this color (10.54:1).
About this color
#642D40 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.082 and its hue 360°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.037 away. White text reads best on it, at 10.54:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.082) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #642D40 |
| RGB | rgb(100, 45, 64) |
| HSL | hsl(339, 38%, 28%) |
| OKLCH | oklch(37.8% 0.082 360) |
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 #642D40 | 10.54:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #642D40 | 1.99:1 | Fails | Lc 9.8 | Not readable |
| #642D40 text on white | 10.54:1 | AAA | Lc 94.1 | Preferred for body text |
| #642D40 text on black | 1.99:1 | Fails | Lc -8.5 | 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
#FBF3F5
oklch(97.1% 0.009 0.1)
-
Step 100
100
#F5E5E9
oklch(93.6% 0.018 0.4)
-
Step 200
200
#EED0D8
oklch(88.5% 0.035 359.9)
-
Step 300
300
#E3B1BF
oklch(81% 0.061 360)
-
Step 400
400
#D3869E
oklch(70.6% 0.099 359.8)
-
Step 500
500
#C66686
oklch(63.1% 0.127 0.2)
-
Step 600
600
#B14B70
oklch(55.6% 0.138 359.9)
-
Step 700
700
#983C5E
oklch(49.2% 0.128 359.9)
-
Step 800
800
#7B324D
oklch(42.6% 0.106 359.4)
-
Step 900
900 (this color)
#642D40
oklch(37.8% 0.082 360)
-
Step 950
950
#3B1B25
oklch(27.1% 0.052 1.2)
#642D40 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) | #363941 | 0.090 |
| Deuteranopia (no green cones) | #44433F | 0.083 |
| Tritanopia (no blue cones) | #6C2934 | 0.024 |
| Achromatopsia (no color) | #3F3F3F | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642D40
#642D40
oklch(37.8% 0.082 360)
- #004D43
#004D43
oklch(37.7% 0.068 180.3)
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 #642D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.037
- Merlot #730039 ΔE 0.066
- Brownish Purple #76424E ΔE 0.069
- Bordeaux #7B002C ΔE 0.070
- Wine Red #7B0323 ΔE 0.072
- Grape Purple #5D1451 ΔE 0.072
- Wine #80013F ΔE 0.075
- Velvet #750851 ΔE 0.075
Use #642D40 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.