#66509A
Closest named color: Twilight (#4E518B). oklch(48.8% 0.116 295.5), rgb(102, 80, 154).
Aa
White text reads best on this color (6.60:1).
About this color
#66509A is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.116 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.046 away. White text reads best on it, at 6.60:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.17:1 |
| White text | 6.60:1 |
Values
| HEX | #66509A |
| RGB | rgb(102, 80, 154) |
| HSL | hsl(258, 32%, 46%) |
| OKLCH | oklch(48.8% 0.116 295.5) |
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 #66509A | 6.60:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #66509A | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #66509A text on white | 6.60:1 | AA | Lc 82.5 | Fine for body text |
| #66509A text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#DAD5EC
oklch(88.4% 0.032 295.7)
-
Step 300
300
#C3BAE2
oklch(80.9% 0.057 295.4)
-
Step 400
400
#A595D3
oklch(70.7% 0.091 295.8)
-
Step 500
500
#8F7AC7
oklch(63% 0.115 295.5)
-
Step 600
600
#7A62B4
oklch(55.6% 0.125 295.5)
-
Step 700
700 (this color)
#66509A
oklch(48.8% 0.116 295.5)
-
Step 800
800
#54427E
oklch(42.7% 0.098 295.8)
-
Step 900
900
#453965
oklch(37.8% 0.074 295.2)
-
Step 950
950
#28213B
oklch(26.9% 0.048 295.4)
#66509A 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) | #375D9D | 0.070 |
| Deuteranopia (no green cones) | #3B5C98 | 0.066 |
| Tritanopia (no blue cones) | #5A5E6D | 0.094 |
| Achromatopsia (no color) | #5D5D5D | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66509A
#66509A
oklch(48.8% 0.116 295.5)
- #5E6700
#5E6700
oklch(48.9% 0.111 115.6)
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 #66509A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.046
- Dusk #4E5481 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.060
- Iris #6258C4 ΔE 0.067
- Muted Purple #805B87 ΔE 0.068
- Rebecca Purple #663399 ΔE 0.068
- Denim Blue #3B5B92 ΔE 0.068
- Blueberry #464196 ΔE 0.070
Use #66509A 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.