#66357E
Closest named color: Rebecca Purple (#663399). oklch(42.5% 0.126 313.3), rgb(102, 53, 126).
Aa
White text reads best on this color (8.84:1).
About this color
#66357E is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.126 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.045 away. White text reads best on it, at 8.84:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.126) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.37:1 |
| White text | 8.84:1 |
Values
| HEX | #66357E |
| RGB | rgb(102, 53, 126) |
| HSL | hsl(280, 41%, 35%) |
| OKLCH | oklch(42.5% 0.126 313.3) |
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 #66357E | 8.84:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #66357E | 2.37:1 | Fails | Lc 14.1 | Not readable |
| #66357E text on white | 8.84:1 | AAA | Lc 89.9 | Fine for body text |
| #66357E text on black | 2.37:1 | Fails | Lc -12.4 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F4
oklch(93.6% 0.021 313.8)
-
Step 200
200
#E3D2ED
oklch(88.6% 0.041 313.2)
-
Step 300
300
#D2B3E3
oklch(80.9% 0.074 313.5)
-
Step 400
400
#BA8AD4
oklch(70.6% 0.117 313.2)
-
Step 500
500
#A96BC9
oklch(63.1% 0.15 313.2)
-
Step 600
600
#9450B6
oklch(55.6% 0.164 313.1)
-
Step 700
700
#7E409C
oklch(49% 0.152 313.3)
-
Step 800
800 (this color)
#66357E
oklch(42.5% 0.126 313.3)
-
Step 900
900
#542F66
oklch(37.7% 0.099 313.6)
-
Step 950
950
#311C3C
oklch(27% 0.063 313.1)
#66357E 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) | #214880 | 0.111 |
| Deuteranopia (no green cones) | #324B7C | 0.098 |
| Tritanopia (no blue cones) | #644154 | 0.084 |
| Achromatopsia (no color) | #4A4A4A | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66357E
#66357E
oklch(42.5% 0.126 313.3)
- #325B00
#325B00
oklch(42.4% 0.12 133)
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 #66357E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.072
- Twilight #4E518B ΔE 0.079
- Purple #800080 ΔE 0.079
- Light Eggplant #894585 ΔE 0.082
- Dusk #4E5481 ΔE 0.087
- Dark Magenta #8B008B ΔE 0.093
Use #66357E 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.