#640D33
Closest named color: Burgundy (#610023). oklch(33.5% 0.122 0.8), rgb(100, 13, 51).
Aa
White text reads best on this color (12.74:1).
About this color
#640D33 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.122 and its hue 1°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.028 away. White text reads best on it, at 12.74:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.122) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.64:1 |
| White text | 12.74:1 |
Values
| HEX | #640D33 |
| RGB | rgb(100, 13, 51) |
| HSL | hsl(334, 77%, 22%) |
| OKLCH | oklch(33.5% 0.122 0.8) |
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 #640D33 | 12.74:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #640D33 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #640D33 text on white | 12.74:1 | AAA | Lc 97.5 | Preferred for body text |
| #640D33 text on black | 1.64:1 | 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
#FAE3E9
oklch(93.6% 0.026 359.9)
-
Step 200
200
#F7CCD7
oklch(88.5% 0.05 1.1)
-
Step 300
300
#F3A8BD
oklch(80.9% 0.092 1)
-
Step 400
400
#E9769B
oklch(70.8% 0.147 1.1)
-
Step 500
500
#DE4C83
oklch(63.1% 0.187 0.9)
-
Step 600
600
#C9246D
oklch(55.6% 0.204 0.6)
-
Step 700
700
#AD125B
oklch(49% 0.189 0.5)
-
Step 800
800
#8D164A
oklch(42.7% 0.157 0.9)
-
Step 900
900 (this color)
#640D33
oklch(33.5% 0.122 0.8)
-
Step 950
950
#431224
oklch(27% 0.078 1.1)
#640D33 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) | #232834 | 0.138 |
| Deuteranopia (no green cones) | #3A3831 | 0.123 |
| Tritanopia (no blue cones) | #6D001F | 0.036 |
| Achromatopsia (no color) | #323232 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640D33
#640D33
oklch(33.5% 0.122 0.8)
- #004038
#004038
oklch(33.3% 0.06 181.2)
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 #640D33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.028
- Merlot #730039 ΔE 0.034
- Claret #680018 ΔE 0.041
- Bordeaux #7B002C ΔE 0.052
- Grape Purple #5D1451 ΔE 0.055
- Wine Red #7B0323 ΔE 0.057
- Velvet #750851 ΔE 0.062
- Wine #80013F ΔE 0.064
Use #640D33 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.