#664D83
Closest named color: Twilight (#4E518B). oklch(46.9% 0.089 304.5), rgb(102, 77, 131).
Aa
White text reads best on this color (7.10:1).
About this color
#664D83 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.089 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.041 away. White text reads best on it, at 7.10:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #664D83 |
| RGB | rgb(102, 77, 131) |
| HSL | hsl(268, 26%, 41%) |
| OKLCH | oklch(46.9% 0.089 304.5) |
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 #664D83 | 7.10:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #664D83 | 2.95:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #664D83 text on white | 7.10:1 | AAA | Lc 84.6 | Fine for body text |
| #664D83 text on black | 2.95:1 | Fails | Lc -17.4 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE8F1
oklch(93.7% 0.013 306)
-
Step 200
200
#DCD5E6
oklch(88.4% 0.024 304.5)
-
Step 300
300
#C7BAD8
oklch(80.9% 0.044 305)
-
Step 400
400
#AA96C4
oklch(70.7% 0.069 304.5)
-
Step 500
500
#957CB5
oklch(63.1% 0.088 304.1)
-
Step 600
600
#8064A1
oklch(55.5% 0.097 304.5)
-
Step 700
700 (this color)
#664D83
oklch(46.9% 0.089 304.5)
-
Step 800
800
#584470
oklch(42.7% 0.075 304.3)
-
Step 900
900
#483A5A
oklch(37.7% 0.056 303.9)
-
Step 950
950
#2A2235
oklch(27% 0.036 303.4)
#664D83 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) | #405785 | 0.061 |
| Deuteranopia (no green cones) | #465882 | 0.056 |
| Tritanopia (no blue cones) | #615662 | 0.067 |
| Achromatopsia (no color) | #585858 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664D83
#664D83
oklch(46.9% 0.089 304.5)
- #506326
#506326
oklch(47% 0.089 124.3)
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 #664D83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.041
- Dusk #4E5481 ΔE 0.042
- Dusty Grape #545775 ΔE 0.049
- Muted Purple #805B87 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.065
- Light Eggplant #894585 ΔE 0.065
- Dull Purple #84597E ΔE 0.067
- Denim Blue #3B5B92 ΔE 0.070
Use #664D83 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.