#66239E
Closest named color: Rebecca Purple (#663399). oklch(42.5% 0.185 304.1), rgb(102, 35, 158).
Aa
White text reads best on this color (9.13:1).
About this color
#66239E is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.185 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.029 away. White text reads best on it, at 9.13:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #66239E |
| RGB | rgb(102, 35, 158) |
| HSL | hsl(273, 64%, 38%) |
| OKLCH | oklch(42.5% 0.185 304.1) |
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 #66239E | 9.13:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #66239E | 2.29:1 | Fails | Lc 13.9 | Not readable |
| #66239E text on white | 9.13:1 | AAA | Lc 90.0 | Preferred for body text |
| #66239E text on black | 2.29:1 | Fails | Lc -12.2 | 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
#F7F3FE
oklch(97% 0.015 302.6)
-
Step 100
100
#EEE5FB
oklch(93.5% 0.031 304.3)
-
Step 200
200
#E2D0FA
oklch(88.5% 0.06 304.6)
-
Step 300
300
#D0AFFA
oklch(80.9% 0.109 304.2)
-
Step 400
400
#B981F7
oklch(70.7% 0.174 304.2)
-
Step 500
500
#A85AF3
oklch(63% 0.222 304.2)
-
Step 600
600
#9437E2
oklch(55.6% 0.241 304.1)
-
Step 700
700
#7E27C4
oklch(49.1% 0.224 304)
-
Step 800
800 (this color)
#66239E
oklch(42.5% 0.185 304.1)
-
Step 900
900
#53257E
oklch(37.7% 0.144 303.9)
-
Step 950
950
#31174A
oklch(27.1% 0.092 304.4)
#66239E 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) | #0047A1 | 0.136 |
| Deuteranopia (no green cones) | #00489C | 0.137 |
| Tritanopia (no blue cones) | #5B4360 | 0.133 |
| Achromatopsia (no color) | #484848 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66239E
#66239E
oklch(42.5% 0.185 304.1)
- #435700
#435700
oklch(42.4% 0.105 123.6)
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 #66239E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.029
- Grape #7209B7 ΔE 0.048
- Chrysanthemum #560BAD ΔE 0.051
- Imperial Purple #480CA8 ΔE 0.073
- Dark Slate Blue #483D8B ΔE 0.078
- Blueberry #464196 ΔE 0.079
- Purple #800080 ΔE 0.080
- Purple Blue #5D21D0 ΔE 0.084
Use #66239E 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.