#66429D
Closest named color: Rebecca Purple (#663399). oklch(46.6% 0.143 299), rgb(102, 66, 157).
Aa
White text reads best on this color (7.41:1).
About this color
#66429D is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.143 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.033 away. White text reads best on it, at 7.41:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.83:1 |
| White text | 7.41:1 |
Values
| HEX | #66429D |
| RGB | rgb(102, 66, 157) |
| HSL | hsl(264, 41%, 44%) |
| OKLCH | oklch(46.6% 0.143 299) |
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 #66429D | 7.41:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #66429D | 2.83:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #66429D text on white | 7.41:1 | AAA | Lc 85.5 | Fine for body text |
| #66429D text on black | 2.83:1 | Fails | Lc -16.6 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DCD4F0
oklch(88.5% 0.039 298.7)
-
Step 300
300
#C6B7E8
oklch(80.8% 0.07 298.8)
-
Step 400
400
#AA91DC
oklch(70.7% 0.11 298.9)
-
Step 500
500
#9674D2
oklch(63.2% 0.14 299)
-
Step 600
600
#815ABF
oklch(55.6% 0.154 299.2)
-
Step 700
700 (this color)
#66429D
oklch(46.6% 0.143 299)
-
Step 800
800
#593D86
oklch(42.8% 0.118 299)
-
Step 900
900
#49356B
oklch(37.8% 0.091 299.1)
-
Step 950
950
#2B1F3F
oklch(27% 0.059 299.7)
#66429D 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) | #1755A0 | 0.103 |
| Deuteranopia (no green cones) | #25559B | 0.096 |
| Tritanopia (no blue cones) | #5A5569 | 0.110 |
| Achromatopsia (no color) | #555555 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66429D
#66429D
oklch(46.6% 0.143 299)
- #536100
#536100
oklch(46.4% 0.109 119)
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 #66429D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.033
- Blueberry #464196 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.062
- Twilight #4E518B ΔE 0.063
- Bluey Purple #6241C7 ΔE 0.068
- Blue With A Hint Of Purple #533CC6 ΔE 0.076
- Iris #6258C4 ΔE 0.077
- Dusk #4E5481 ΔE 0.080
Use #66429D 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.