#640D54
Closest named color: Grape Purple (#5D1451). oklch(35% 0.141 337.3), rgb(100, 13, 84).
Aa
White text reads best on this color (12.15:1).
About this color
#640D54 is a dark, vivid purple. In OKLCH its lightness is 35%, its chroma 0.141 and its hue 337°. Its hue sits on the warm side of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.017 away. White text reads best on it, at 12.15:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | vivid (0.141) |
| Temperature | warm |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.72:1 |
| White text | 12.15:1 |
Values
| HEX | #640D54 |
| RGB | rgb(100, 13, 84) |
| HSL | hsl(311, 77%, 22%) |
| OKLCH | oklch(35% 0.141 337.3) |
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 #640D54 | 12.15:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #640D54 | 1.72:1 | Fails | Lc 7.5 | Not readable |
| #640D54 text on white | 12.15:1 | AAA | Lc 96.4 | Preferred for body text |
| #640D54 text on black | 1.72:1 | 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
#FCF2F9
oklch(97.1% 0.014 336.1)
-
Step 100
100
#F8E3F1
oklch(93.7% 0.029 337.9)
-
Step 200
200
#F4CBE7
oklch(88.5% 0.059 337.8)
-
Step 300
300
#EDA6D9
oklch(80.9% 0.106 337.3)
-
Step 400
400
#E172C6
oklch(70.7% 0.17 337.3)
-
Step 500
500
#D545B7
oklch(63% 0.216 337.3)
-
Step 600
600
#C015A3
oklch(55.5% 0.235 337.2)
-
Step 700
700
#A5008B
oklch(49.1% 0.216 337.3)
-
Step 800
800
#860B71
oklch(42.6% 0.18 337.2)
-
Step 900
900 (this color)
#640D54
oklch(35% 0.141 337.3)
-
Step 950
950
#401036
oklch(27% 0.09 337.1)
#640D54 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) | #112D56 | 0.157 |
| Deuteranopia (no green cones) | #303A52 | 0.133 |
| Tritanopia (no blue cones) | #6A1431 | 0.068 |
| Achromatopsia (no color) | #363636 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640D54
#640D54
oklch(35% 0.141 337.3)
- #004729
#004729
oklch(35% 0.083 157.6)
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 #640D54, closest first.
No curated palette has a color within ΔE 0.04 of #640D54.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.017
- Rich Purple #720058 ΔE 0.031
- Velvet #750851 ΔE 0.039
- Plum Purple #4E0550 ΔE 0.054
- Merlot #730039 ΔE 0.059
- Deep Violet #490648 ΔE 0.067
- Red Purple #820747 ΔE 0.073
- Wine #80013F ΔE 0.074
Use #640D54 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.