#66418F
Closest named color: Rebecca Purple (#663399). oklch(45.5% 0.127 303.7), rgb(102, 65, 143).
Aa
White text reads best on this color (7.72:1).
About this color
#66418F is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.127 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 0.037 away. White text reads best on it, at 7.72:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #66418F |
| RGB | rgb(102, 65, 143) |
| HSL | hsl(268, 38%, 41%) |
| OKLCH | oklch(45.5% 0.127 303.7) |
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 #66418F | 7.72:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #66418F | 2.71:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #66418F text on white | 7.72:1 | AAA | Lc 86.6 | Fine for body text |
| #66418F text on black | 2.71:1 | Fails | Lc -15.5 | 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 800.
-
Step 50
50
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE7F6
oklch(93.7% 0.021 304)
-
Step 200
200
#DFD3F0
oklch(88.5% 0.041 304.3)
-
Step 300
300
#CAB5E8
oklch(80.8% 0.074 303.5)
-
Step 400
400
#B08EDD
oklch(70.8% 0.118 303.3)
-
Step 500
500
#9D6FD3
oklch(63% 0.151 303.6)
-
Step 600
600
#8855C0
oklch(55.5% 0.164 303.5)
-
Step 700
700
#7445A6
oklch(49.2% 0.152 303.6)
-
Step 800
800 (this color)
#66418F
oklch(45.5% 0.127 303.7)
-
Step 900
900
#4D326C
oklch(37.7% 0.099 303.5)
-
Step 950
950
#2D1E3F
oklch(27.1% 0.062 303.5)
#66418F 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) | #265292 | 0.095 |
| Deuteranopia (no green cones) | #32538D | 0.087 |
| Tritanopia (no blue cones) | #5F5061 | 0.096 |
| Achromatopsia (no color) | #535353 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66418F
#66418F
oklch(45.5% 0.127 303.7)
- #4A6000
#4A6000
oklch(45.4% 0.112 123.7)
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 #66418F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.056
- Twilight #4E518B ΔE 0.056
- Blueberry #464196 ΔE 0.057
- Dusk #4E5481 ΔE 0.069
- Light Eggplant #894585 ΔE 0.071
- Dusty Grape #545775 ΔE 0.085
- Dusky Blue #475F94 ΔE 0.088
Use #66418F 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.