#66508E
Closest named color: Twilight (#4E518B). oklch(48.1% 0.1 299), rgb(102, 80, 142).
Aa
White text reads best on this color (6.76:1).
About this color
#66508E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.100 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.039 away. White text reads best on it, at 6.76:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.10:1 |
| White text | 6.76:1 |
Values
| HEX | #66508E |
| RGB | rgb(102, 80, 142) |
| HSL | hsl(261, 28%, 44%) |
| OKLCH | oklch(48.1% 0.1 299) |
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 #66508E | 6.76:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #66508E | 3.10:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #66508E text on white | 6.76:1 | AA | Lc 83.2 | Fine for body text |
| #66508E text on black | 3.10:1 | AA large text | Lc -18.7 | 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
#EBE8F2
oklch(93.6% 0.014 299.8)
-
Step 200
200
#DBD6E9
oklch(88.6% 0.026 297.9)
-
Step 300
300
#C4BADC
oklch(80.8% 0.048 298.8)
-
Step 400
400
#A796CA
oklch(70.6% 0.077 299.4)
-
Step 500
500
#927CBD
oklch(63.2% 0.098 299.1)
-
Step 600
600
#7C64A9
oklch(55.6% 0.107 298.9)
-
Step 700
700 (this color)
#66508E
oklch(48.1% 0.1 299)
-
Step 800
800
#554476
oklch(42.7% 0.083 298.5)
-
Step 900
900
#463A5F
oklch(37.8% 0.063 298.2)
-
Step 950
950
#292238
oklch(27% 0.041 298.2)
#66508E 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) | #3F5B90 | 0.061 |
| Deuteranopia (no green cones) | #435B8C | 0.058 |
| Tritanopia (no blue cones) | #5E5B68 | 0.079 |
| Achromatopsia (no color) | #5B5B5B | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66508E
#66508E
oklch(48.1% 0.1 299)
- #58651A
#58651A
oklch(48% 0.099 118.9)
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 #66508E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.039
- Dusk #4E5481 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.057
- Dusty Grape #545775 ΔE 0.058
- Muted Purple #805B87 ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.065
- Light Eggplant #894585 ΔE 0.067
- Dull Purple #84597E ΔE 0.068
Use #66508E 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.