#664290
Closest named color: Rebecca Purple (#663399). oklch(45.7% 0.126 303.1), rgb(102, 66, 144).
Aa
White text reads best on this color (7.64:1).
About this color
#664290 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.126 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.038 away. White text reads best on it, at 7.64:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #664290 |
| RGB | rgb(102, 66, 144) |
| HSL | hsl(268, 37%, 41%) |
| OKLCH | oklch(45.7% 0.126 303.1) |
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 #664290 | 7.64:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #664290 | 2.74:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #664290 text on white | 7.64:1 | AAA | Lc 86.3 | Fine for body text |
| #664290 text on black | 2.74:1 | Fails | Lc -15.8 | Dividers and decoration only |
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 800.
-
Step 50
50
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DED3F0
oklch(88.5% 0.041 302.8)
-
Step 300
300
#CAB6E8
oklch(81% 0.073 303.1)
-
Step 400
400
#AF8EDD
oklch(70.7% 0.118 302.7)
-
Step 500
500
#9C70D3
oklch(63.1% 0.149 302.9)
-
Step 600
600
#8855C1
oklch(55.6% 0.165 303.2)
-
Step 700
700
#7345A6
oklch(49.1% 0.152 303.1)
-
Step 800
800 (this color)
#664290
oklch(45.7% 0.126 303.1)
-
Step 900
900
#4C326C
oklch(37.6% 0.099 302.6)
-
Step 950
950
#2D1E3F
oklch(27.1% 0.062 303.5)
#664290 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) | #275393 | 0.094 |
| Deuteranopia (no green cones) | #32538E | 0.085 |
| Tritanopia (no blue cones) | #5E5162 | 0.096 |
| Achromatopsia (no color) | #535353 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664290
#664290
oklch(45.7% 0.126 303.1)
- #4C6100
#4C6100
oklch(45.9% 0.113 123.1)
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 #664290, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.038
- Twilight #4E518B ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.057
- Dusk #4E5481 ΔE 0.068
- Light Eggplant #894585 ΔE 0.071
- Dusty Grape #545775 ΔE 0.084
- Dusky Blue #475F94 ΔE 0.086
Use #664290 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.