#640F31
Closest named color: Burgundy (#610023). oklch(33.6% 0.12 2.8), rgb(100, 15, 49).
Aa
White text reads best on this color (12.69:1).
About this color
#640F31 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.120 and its hue 3°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.026 away. White text reads best on it, at 12.69:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.120) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.65:1 |
| White text | 12.69:1 |
Values
| HEX | #640F31 |
| RGB | rgb(100, 15, 49) |
| HSL | hsl(336, 74%, 23%) |
| OKLCH | oklch(33.6% 0.12 2.8) |
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 #640F31 | 12.69:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #640F31 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #640F31 text on white | 12.69:1 | AAA | Lc 97.5 | Preferred for body text |
| #640F31 text on black | 1.65:1 | 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
#FAE3E8
oklch(93.6% 0.026 2.8)
-
Step 200
200
#F7CCD6
oklch(88.5% 0.05 2.5)
-
Step 300
300
#F2A9BB
oklch(80.9% 0.089 3.1)
-
Step 400
400
#E87798
oklch(70.7% 0.143 2.9)
-
Step 500
500
#DE4E7F
oklch(63.2% 0.183 3)
-
Step 600
600
#C92868
oklch(55.7% 0.199 3.1)
-
Step 700
700
#AD1657
oklch(49.1% 0.186 2.7)
-
Step 800
800
#8D1847
oklch(42.8% 0.154 3)
-
Step 900
900 (this color)
#640F31
oklch(33.6% 0.12 2.8)
-
Step 950
950
#431323
oklch(27.1% 0.076 3)
#640F31 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) | #252832 | 0.134 |
| Deuteranopia (no green cones) | #3B392F | 0.123 |
| Tritanopia (no blue cones) | #6D001E | 0.034 |
| Achromatopsia (no color) | #333333 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640F31
#640F31
oklch(33.6% 0.12 2.8)
- #00413A
#00413A
oklch(33.7% 0.06 183)
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 #640F31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.026
- Merlot #730039 ΔE 0.036
- Claret #680018 ΔE 0.038
- Bordeaux #7B002C ΔE 0.051
- Wine Red #7B0323 ΔE 0.055
- Grape Purple #5D1451 ΔE 0.059
- Reddy Brown #6E1005 ΔE 0.062
- Wine #80013F ΔE 0.064
Use #640F31 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.