#66417E
Closest named color: Twilight (#4E518B). oklch(44.4% 0.105 310.8), rgb(102, 65, 126).
Aa
White text reads best on this color (8.00:1).
About this color
#66417E is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.105 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.056 away. White text reads best on it, at 8.00:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.62:1 |
| White text | 8.00:1 |
Values
| HEX | #66417E |
| RGB | rgb(102, 65, 126) |
| HSL | hsl(276, 32%, 37%) |
| OKLCH | oklch(44.4% 0.105 310.8) |
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 #66417E | 8.00:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #66417E | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #66417E text on white | 8.00:1 | AAA | Lc 87.6 | Fine for body text |
| #66417E text on black | 2.62:1 | Fails | Lc -14.6 | Not readable |
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 800.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE7F3
oklch(93.7% 0.018 311.6)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CDB6DE
oklch(80.9% 0.061 310.8)
-
Step 400
400
#B48FCE
oklch(70.7% 0.098 310.8)
-
Step 500
500
#A172C1
oklch(63% 0.125 310.6)
-
Step 600
600
#8C59AD
oklch(55.5% 0.136 310.7)
-
Step 700
700
#774995
oklch(49.1% 0.126 310.5)
-
Step 800
800 (this color)
#66417E
oklch(44.4% 0.105 310.8)
-
Step 900
900
#4F3461
oklch(37.7% 0.081 310.7)
-
Step 950
950
#2E1F39
oklch(27% 0.051 309.8)
#66417E 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) | #334F80 | 0.084 |
| Deuteranopia (no green cones) | #3D517C | 0.076 |
| Tritanopia (no blue cones) | #634B59 | 0.075 |
| Achromatopsia (no color) | #505050 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66417E
#66417E
oklch(44.4% 0.105 310.8)
- #3F5F18
#3F5F18
oklch(44.5% 0.105 130.7)
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 #66417E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.056
- Rebecca Purple #663399 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Dusk #4E5481 ΔE 0.061
- Blueberry #464196 ΔE 0.069
- Light Eggplant #894585 ΔE 0.069
- Dusty Grape #545775 ΔE 0.071
- Brownish Purple #76424E ΔE 0.087
Use #66417E 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.