#66529B
Closest named color: Twilight (#4E518B). oklch(49.3% 0.115 294.4), rgb(102, 82, 155).
Aa
White text reads best on this color (6.47:1).
About this color
#66529B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.115 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.047 away. White text reads best on it, at 6.47:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.24:1 |
| White text | 6.47:1 |
Values
| HEX | #66529B |
| RGB | rgb(102, 82, 155) |
| HSL | hsl(256, 31%, 46%) |
| OKLCH | oklch(49.3% 0.115 294.4) |
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 #66529B | 6.47:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #66529B | 3.24:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #66529B text on white | 6.47:1 | AA | Lc 82.0 | Fine for body text |
| #66529B text on black | 3.24:1 | AA large text | Lc -19.9 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#DAD6EC
oklch(88.6% 0.03 294.1)
-
Step 300
300
#C2BAE2
oklch(80.9% 0.056 294.3)
-
Step 400
400
#A496D3
oklch(70.8% 0.089 294.6)
-
Step 500
500
#8E7BC7
oklch(63.1% 0.113 294.4)
-
Step 600
600
#7963B4
oklch(55.7% 0.124 294.6)
-
Step 700
700 (this color)
#66529B
oklch(49.3% 0.115 294.4)
-
Step 800
800
#53437D
oklch(42.7% 0.095 294.8)
-
Step 900
900
#443965
oklch(37.7% 0.074 294)
-
Step 950
950
#28223B
oklch(27.1% 0.046 294.1)
#66529B 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) | #3A5F9E | 0.066 |
| Deuteranopia (no green cones) | #3D5D99 | 0.063 |
| Tritanopia (no blue cones) | #5A606F | 0.093 |
| Achromatopsia (no color) | #5E5E5E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66529B
#66529B
oklch(49.3% 0.115 294.4)
- #606800
#606800
oklch(49.3% 0.112 114.9)
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 #66529B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.047
- Dusky Blue #475F94 ΔE 0.057
- Dusk #4E5481 ΔE 0.059
- Iris #6258C4 ΔE 0.065
- Muted Purple #805B87 ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.067
- Rebecca Purple #663399 ΔE 0.073
- Blueberry #464196 ΔE 0.073
Use #66529B 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.