#664494
Closest named color: Rebecca Purple (#663399). oklch(46.3% 0.128 301.2), rgb(102, 68, 148).
Aa
White text reads best on this color (7.44:1).
About this color
#664494 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.128 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.040 away. White text reads best on it, at 7.44:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.81:1 |
| White text | 7.44:1 |
Values
| HEX | #664494 |
| RGB | rgb(102, 68, 148) |
| HSL | hsl(266, 37%, 42%) |
| OKLCH | oklch(46.3% 0.128 301.2) |
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 #664494 | 7.44:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #664494 | 2.81:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #664494 text on white | 7.44:1 | AAA | Lc 85.6 | Fine for body text |
| #664494 text on black | 2.81:1 | Fails | Lc -16.4 | 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 700.
-
Step 50
50
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DDD4ED
oklch(88.5% 0.035 302)
-
Step 300
300
#C7B8E3
oklch(80.9% 0.062 301)
-
Step 400
400
#AB92D5
oklch(70.7% 0.099 301)
-
Step 500
500
#9776C9
oklch(63.1% 0.126 301.2)
-
Step 600
600
#825DB6
oklch(55.6% 0.137 301.3)
-
Step 700
700 (this color)
#664494
oklch(46.3% 0.128 301.2)
-
Step 800
800
#593F7F
oklch(42.7% 0.105 300.8)
-
Step 900
900
#493666
oklch(37.7% 0.082 300.8)
-
Step 950
950
#2B203C
oklch(27.1% 0.052 301.1)
#664494 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) | #275597 | 0.092 |
| Deuteranopia (no green cones) | #315592 | 0.085 |
| Tritanopia (no blue cones) | #5D5365 | 0.097 |
| Achromatopsia (no color) | #555555 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664494
#664494
oklch(46.3% 0.128 301.2)
- #506200
#506200
oklch(46.4% 0.112 121.3)
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 #664494, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.040
- Twilight #4E518B ΔE 0.053
- Blueberry #464196 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.059
- Dusk #4E5481 ΔE 0.068
- Light Eggplant #894585 ΔE 0.072
- Dusky Blue #475F94 ΔE 0.082
- Bluey Purple #6241C7 ΔE 0.083
Use #664494 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.