#66357D
Closest named color: Rebecca Purple (#663399). oklch(42.4% 0.125 313.7), rgb(102, 53, 125).
Aa
White text reads best on this color (8.85:1).
About this color
#66357D is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.125 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.047 away. White text reads best on it, at 8.85:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #66357D |
| RGB | rgb(102, 53, 125) |
| HSL | hsl(281, 40%, 35%) |
| OKLCH | oklch(42.4% 0.125 313.7) |
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 #66357D | 8.85:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #66357D | 2.37:1 | Fails | Lc 14.1 | Not readable |
| #66357D text on white | 8.85:1 | AAA | Lc 89.9 | Fine for body text |
| #66357D 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
#E3D2EC
oklch(88.5% 0.04 314.1)
-
Step 300
300
#D2B3E2
oklch(80.9% 0.073 314.1)
-
Step 400
400
#BB8AD4
oklch(70.7% 0.117 313.8)
-
Step 500
500
#A96BC8
oklch(63.1% 0.149 313.5)
-
Step 600
600
#9451B4
oklch(55.6% 0.16 313.6)
-
Step 700
700
#7F419B
oklch(49.2% 0.15 314.1)
-
Step 800
800 (this color)
#66357D
oklch(42.4% 0.125 313.7)
-
Step 900
900
#543065
oklch(37.8% 0.096 314)
-
Step 950
950
#311C3B
oklch(26.9% 0.062 314.1)
#66357D 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) | #22477F | 0.110 |
| Deuteranopia (no green cones) | #334B7B | 0.097 |
| Tritanopia (no blue cones) | #644153 | 0.085 |
| Achromatopsia (no color) | #4A4A4A | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66357D
#66357D
oklch(42.4% 0.125 313.7)
- #305B00
#305B00
oklch(42.3% 0.121 133.8)
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 #66357D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.047
- 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
- Rich Purple #720058 ΔE 0.093
Use #66357D 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.