#642637
Closest named color: Purple Brown (#673A3F). oklch(36.4% 0.091 5.7), rgb(100, 38, 55).
Aa
White text reads best on this color (11.20:1).
About this color
#642637 is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.091 and its hue 6°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.050 away. White text reads best on it, at 11.20:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 1.87:1 |
| White text | 11.20:1 |
Values
| HEX | #642637 |
| RGB | rgb(100, 38, 55) |
| HSL | hsl(344, 45%, 27%) |
| OKLCH | oklch(36.4% 0.091 5.7) |
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 #642637 | 11.20:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #642637 | 1.87:1 | Fails | Lc 8.5 | Not readable |
| #642637 text on white | 11.20:1 | AAA | Lc 95.4 | Preferred for body text |
| #642637 text on black | 1.87:1 | Fails | Lc -7.3 | 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
#F6E5E8
oklch(93.6% 0.019 5.3)
-
Step 200
200
#F0CFD5
oklch(88.4% 0.038 5.5)
-
Step 300
300
#E8AFBA
oklch(80.9% 0.068 5.9)
-
Step 400
400
#DA8396
oklch(70.7% 0.109 6.1)
-
Step 500
500
#CD617D
oklch(63.1% 0.139 5.6)
-
Step 600
600
#B94566
oklch(55.7% 0.152 5.9)
-
Step 700
700
#9F3555
oklch(49.1% 0.142 5.5)
-
Step 800
800
#812D45
oklch(42.7% 0.117 6)
-
Step 900
900 (this color)
#642637
oklch(36.4% 0.091 5.7)
-
Step 950
950
#3D1922
oklch(27% 0.057 5.9)
#642637 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) | #323337 | 0.101 |
| Deuteranopia (no green cones) | #424036 | 0.093 |
| Tritanopia (no blue cones) | #6D1F2C | 0.025 |
| Achromatopsia (no color) | #3B3B3B | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642637
#642637
oklch(36.4% 0.091 5.7)
- #004943
#004943
oklch(36.5% 0.064 185.5)
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 #642637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.050
- Merlot #730039 ΔE 0.056
- Bordeaux #7B002C ΔE 0.059
- Claret #680018 ΔE 0.060
- Wine Red #7B0323 ΔE 0.060
- Burgundy #610023 ΔE 0.061
- Reddy Brown #6E1005 ΔE 0.063
- Grape Purple #5D1451 ΔE 0.070
Use #642637 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.