#66478F
Closest named color: Twilight (#4E518B). oklch(46.5% 0.116 301.9), rgb(102, 71, 143).
Aa
White text reads best on this color (7.33:1).
About this color
#66478F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.116 and its hue 302°. 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 7.33:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #66478F |
| RGB | rgb(102, 71, 143) |
| HSL | hsl(266, 34%, 42%) |
| OKLCH | oklch(46.5% 0.116 301.9) |
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 #66478F | 7.33:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #66478F | 2.86:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #66478F text on white | 7.33:1 | AAA | Lc 85.3 | Fine for body text |
| #66478F text on black | 2.86:1 | Fails | Lc -16.7 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DDD5EB
oklch(88.6% 0.031 302.3)
-
Step 300
300
#C7B9E0
oklch(81% 0.056 301.5)
-
Step 400
400
#AB93D0
oklch(70.7% 0.091 302.2)
-
Step 500
500
#9678C3
oklch(63.1% 0.114 301.6)
-
Step 600
600
#815FB0
oklch(55.5% 0.126 301.8)
-
Step 700
700 (this color)
#66478F
oklch(46.5% 0.116 301.9)
-
Step 800
800
#59417B
oklch(42.8% 0.096 301.6)
-
Step 900
900
#493763
oklch(37.7% 0.076 301.7)
-
Step 950
950
#2B213A
oklch(27.2% 0.047 301.8)
#66478F 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) | #315692 | 0.082 |
| Deuteranopia (no green cones) | #39568D | 0.075 |
| Tritanopia (no blue cones) | #5E5464 | 0.089 |
| Achromatopsia (no color) | #565656 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66478F
#66478F
oklch(46.5% 0.116 301.9)
- #4F6300
#4F6300
oklch(46.6% 0.113 122.3)
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 #66478F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.046
- Rebecca Purple #663399 ΔE 0.051
- Dusk #4E5481 ΔE 0.058
- Blueberry #464196 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
- Light Eggplant #894585 ΔE 0.067
- Dusty Grape #545775 ΔE 0.074
- Dusky Blue #475F94 ΔE 0.075
Use #66478F 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.