#663D92
Closest named color: Rebecca Purple (#663399). oklch(45% 0.137 303.6), rgb(102, 61, 146).
Aa
White text reads best on this color (7.93:1).
About this color
#663D92 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.137 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 0.025 away. White text reads best on it, at 7.93:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.137) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #663D92 |
| RGB | rgb(102, 61, 146) |
| HSL | hsl(269, 41%, 41%) |
| OKLCH | oklch(45% 0.137 303.6) |
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 #663D92 | 7.93:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #663D92 | 2.64:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #663D92 text on white | 7.93:1 | AAA | Lc 87.2 | Fine for body text |
| #663D92 text on black | 2.64:1 | Fails | Lc -14.9 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F7
oklch(93.5% 0.024 304.5)
-
Step 200
200
#DFD3F2
oklch(88.6% 0.044 303.1)
-
Step 300
300
#CBB4EB
oklch(80.8% 0.08 303.7)
-
Step 400
400
#B28CE1
oklch(70.8% 0.127 303.9)
-
Step 500
500
#9F6CD9
oklch(63.1% 0.164 303.7)
-
Step 600
600
#8A51C6
oklch(55.5% 0.178 303.6)
-
Step 700
700
#7541AB
oklch(49% 0.165 303.5)
-
Step 800
800 (this color)
#663D92
oklch(45% 0.137 303.6)
-
Step 900
900
#4E306F
oklch(37.7% 0.107 303.7)
-
Step 950
950
#2E1D41
oklch(27.1% 0.067 304.1)
#663D92 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) | #1A5095 | 0.107 |
| Deuteranopia (no green cones) | #2A5190 | 0.097 |
| Tritanopia (no blue cones) | #5E4E61 | 0.103 |
| Achromatopsia (no color) | #515151 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D92
#663D92
oklch(45% 0.137 303.6)
- #495F00
#495F00
oklch(45.1% 0.112 123.8)
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 #663D92, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.025
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.056
- Twilight #4E518B ΔE 0.064
- Light Eggplant #894585 ΔE 0.077
- Dusk #4E5481 ΔE 0.079
- Bluey Purple #6241C7 ΔE 0.085
- Blue With A Hint Of Purple #533CC6 ΔE 0.091
Use #663D92 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.