#640C42
Closest named color: Grape Purple (#5D1451). oklch(34% 0.13 349.3), rgb(100, 12, 66).
Aa
White text reads best on this color (12.55:1).
About this color
#640C42 is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.130 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.031 away. White text reads best on it, at 12.55:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.130) |
| Temperature | warm |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.67:1 |
| White text | 12.55:1 |
Values
| HEX | #640C42 |
| RGB | rgb(100, 12, 66) |
| HSL | hsl(323, 79%, 22%) |
| OKLCH | oklch(34% 0.13 349.3) |
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 #640C42 | 12.55:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #640C42 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #640C42 text on white | 12.55:1 | AAA | Lc 97.1 | Preferred for body text |
| #640C42 text on black | 1.67:1 | 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
#FDF2F7
oklch(97.1% 0.013 347.9)
-
Step 100
100
#F9E3ED
oklch(93.6% 0.027 348.3)
-
Step 200
200
#F6CBDF
oklch(88.5% 0.055 348.6)
-
Step 300
300
#F1A7CA
oklch(80.9% 0.097 349.6)
-
Step 400
400
#E674AF
oklch(70.7% 0.156 349.5)
-
Step 500
500
#DB489C
oklch(63.1% 0.2 349.1)
-
Step 600
600
#C61E86
oklch(55.6% 0.216 349.4)
-
Step 700
700
#AB0872
oklch(49.2% 0.202 349.3)
-
Step 800
800
#8B115D
oklch(42.8% 0.167 349.2)
-
Step 900
900 (this color)
#640C42
oklch(34% 0.13 349.3)
-
Step 950
950
#42112C
oklch(27% 0.082 350)
#640C42 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) | #1D2A43 | 0.147 |
| Deuteranopia (no green cones) | #373940 | 0.128 |
| Tritanopia (no blue cones) | #6C0526 | 0.051 |
| Achromatopsia (no color) | #333333 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640C42
#640C42
oklch(34% 0.13 349.3)
- #004332
#004332
oklch(34% 0.068 169.2)
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 #640C42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.031
- Merlot #730039 ΔE 0.037
- Velvet #750851 ΔE 0.044
- Rich Purple #720058 ΔE 0.048
- Burgundy #610023 ΔE 0.052
- Wine #80013F ΔE 0.062
- Plum Purple #4E0550 ΔE 0.063
- Bordeaux #7B002C ΔE 0.064
Use #640C42 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.