#640A33
Closest named color: Burgundy (#610023). oklch(33.3% 0.125 0.3), rgb(100, 10, 51).
Aa
White text reads best on this color (12.85:1).
About this color
#640A33 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.125 and its hue 0°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.027 away. White text reads best on it, at 12.85:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.125) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.63:1 |
| White text | 12.85:1 |
Values
| HEX | #640A33 |
| RGB | rgb(100, 10, 51) |
| HSL | hsl(333, 82%, 22%) |
| OKLCH | oklch(33.3% 0.125 0.3) |
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 #640A33 | 12.85:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #640A33 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #640A33 text on white | 12.85:1 | AAA | Lc 97.6 | Preferred for body text |
| #640A33 text on black | 1.63:1 | 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
#F8CCD7
oklch(88.6% 0.052 1.5)
-
Step 300
300
#F3A7BE
oklch(80.8% 0.094 359.7)
-
Step 400
400
#EA759C
oklch(70.8% 0.15 0.5)
-
Step 500
500
#DF4A84
oklch(63.1% 0.191 0.3)
-
Step 600
600
#CA206E
oklch(55.5% 0.208 0)
-
Step 700
700
#AE0C5B
oklch(49% 0.193 0.4)
-
Step 800
800
#8E134B
oklch(42.8% 0.16 0.3)
-
Step 900
900 (this color)
#640A33
oklch(33.3% 0.125 0.3)
-
Step 950
950
#431225
oklch(27% 0.078 359.8)
#640A33 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) | #222734 | 0.141 |
| Deuteranopia (no green cones) | #3A3831 | 0.126 |
| Tritanopia (no blue cones) | #6D001E | 0.038 |
| Achromatopsia (no color) | #323232 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640A33
#640A33
oklch(33.3% 0.125 0.3)
- #004037
#004037
oklch(33.3% 0.061 179.6)
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 #640A33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.027
- Merlot #730039 ΔE 0.034
- Claret #680018 ΔE 0.042
- Bordeaux #7B002C ΔE 0.053
- Grape Purple #5D1451 ΔE 0.055
- Wine Red #7B0323 ΔE 0.059
- Velvet #750851 ΔE 0.062
- Wine #80013F ΔE 0.064
Use #640A33 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.