#640731
Closest named color: Burgundy (#610023). oklch(33% 0.126 1.4), rgb(100, 7, 49).
Aa
White text reads best on this color (12.99:1).
About this color
#640731 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.126 and its hue 1°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.024 away. White text reads best on it, at 12.99:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.126) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.61:1 |
| White text | 12.99:1 |
Values
| HEX | #640731 |
| RGB | rgb(100, 7, 49) |
| HSL | hsl(333, 87%, 21%) |
| OKLCH | oklch(33% 0.126 1.4) |
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 #640731 | 12.99:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #640731 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #640731 text on white | 12.99:1 | AAA | Lc 97.7 | Preferred for body text |
| #640731 text on black | 1.61:1 | Fails | Lc 0.0 | 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
#FDF2F5
oklch(97.1% 0.012 358.8)
-
Step 100
100
#FBE3E8
oklch(93.7% 0.027 3.4)
-
Step 200
200
#F8CBD7
oklch(88.4% 0.053 0.4)
-
Step 300
300
#F4A7BC
oklch(80.8% 0.094 1.6)
-
Step 400
400
#EB749A
oklch(70.7% 0.151 1.5)
-
Step 500
500
#E14882
oklch(63.1% 0.194 1.2)
-
Step 600
600
#CC1D6B
oklch(55.6% 0.21 1.5)
-
Step 700
700
#B00659
oklch(49.1% 0.196 1.5)
-
Step 800
800
#8F1049
oklch(42.7% 0.162 1.4)
-
Step 900
900 (this color)
#640731
oklch(33% 0.126 1.4)
-
Step 950
950
#441124
oklch(27% 0.08 1.2)
#640731 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) | #212632 | 0.144 |
| Deuteranopia (no green cones) | #3A372F | 0.127 |
| Tritanopia (no blue cones) | #6D001C | 0.039 |
| Achromatopsia (no color) | #313131 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640731
#640731
oklch(33% 0.126 1.4)
- #003F37
#003F37
oklch(33% 0.059 181.1)
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 #640731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.024
- Merlot #730039 ΔE 0.035
- Claret #680018 ΔE 0.039
- Bordeaux #7B002C ΔE 0.053
- Grape Purple #5D1451 ΔE 0.058
- Wine Red #7B0323 ΔE 0.058
- Velvet #750851 ΔE 0.064
- Wine #80013F ΔE 0.065
Use #640731 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.