#640D7B
Closest named color: Purple (#800080). oklch(37.7% 0.172 317.4), rgb(100, 13, 123).
Aa
White text reads best on this color (11.13:1).
About this color
#640D7B is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.172 and its hue 317°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple (#800080), ΔE 0.060 away. White text reads best on it, at 11.13:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Purple (#800080) |
| Black text | 1.88:1 |
| White text | 11.13:1 |
Values
| HEX | #640D7B |
| RGB | rgb(100, 13, 123) |
| HSL | hsl(287, 81%, 27%) |
| OKLCH | oklch(37.7% 0.172 317.4) |
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 #640D7B | 11.13:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #640D7B | 1.88:1 | Fails | Lc 9.6 | Not readable |
| #640D7B text on white | 11.13:1 | AAA | Lc 94.3 | Preferred for body text |
| #640D7B text on black | 1.88:1 | Fails | Lc -8.3 | 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
#FAF2FD
oklch(97% 0.017 316.9)
-
Step 100
100
#F4E3FB
oklch(93.6% 0.037 316.2)
-
Step 200
200
#EDCBF9
oklch(88.5% 0.072 317.2)
-
Step 300
300
#E3A6F7
oklch(81% 0.128 317.6)
-
Step 400
400
#D36FF3
oklch(70.7% 0.206 317.4)
-
Step 500
500
#C63AEE
oklch(63.1% 0.263 317.4)
-
Step 600
600
#AF00D7
oklch(55.7% 0.271 317.4)
-
Step 700
700
#9400B6
oklch(49.2% 0.239 317.5)
-
Step 800
800
#7A0096
oklch(42.7% 0.207 317.7)
-
Step 900
900 (this color)
#640D7B
oklch(37.7% 0.172 317.4)
-
Step 950
950
#3B0D48
oklch(27% 0.109 317.6)
#640D7B 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) | #00367E | 0.156 |
| Deuteranopia (no green cones) | #103E79 | 0.152 |
| Tritanopia (no blue cones) | #632A47 | 0.108 |
| Achromatopsia (no color) | #3B3B3B | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640D7B
#640D7B
oklch(37.7% 0.172 317.4)
- #1E4E00
#1E4E00
oklch(37.5% 0.114 137.3)
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 #640D7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple #800080 ΔE 0.060
- Indigo #4B0082 ΔE 0.062
- Royal Purple #4B006E ΔE 0.063
- Rich Purple #720058 ΔE 0.070
- Grape Purple #5D1451 ΔE 0.074
- Rebecca Purple #663399 ΔE 0.076
- Velvet #750851 ΔE 0.085
- Dark Magenta #8B008B ΔE 0.086
Use #640D7B 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.