#663D93
Closest named color: Rebecca Purple (#663399). oklch(45.1% 0.138 303.3), rgb(102, 61, 147).
Aa
White text reads best on this color (7.91:1).
About this color
#663D93 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.138 and its hue 303°. 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 7.91:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #663D93 |
| RGB | rgb(102, 61, 147) |
| HSL | hsl(269, 41%, 41%) |
| OKLCH | oklch(45.1% 0.138 303.3) |
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 #663D93 | 7.91:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #663D93 | 2.65:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #663D93 text on white | 7.91:1 | AAA | Lc 87.1 | Fine for body text |
| #663D93 text on black | 2.65:1 | Fails | Lc -15.0 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F7
oklch(93.5% 0.024 304.5)
-
Step 200
200
#DFD2F2
oklch(88.4% 0.046 303.9)
-
Step 300
300
#CBB4EC
oklch(80.8% 0.081 303.4)
-
Step 400
400
#B18BE2
oklch(70.6% 0.129 303.4)
-
Step 500
500
#9F6CDA
oklch(63.1% 0.165 303.4)
-
Step 600
600
#8A51C7
oklch(55.6% 0.179 303.3)
-
Step 700
700
#7541AC
oklch(49.1% 0.166 303.2)
-
Step 800
800 (this color)
#663D93
oklch(45.1% 0.138 303.3)
-
Step 900
900
#4E3070
oklch(37.8% 0.108 303.2)
-
Step 950
950
#2D1D41
oklch(27% 0.067 302.7)
#663D93 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) | #195096 | 0.107 |
| Deuteranopia (no green cones) | #295191 | 0.097 |
| Tritanopia (no blue cones) | #5E4E62 | 0.102 |
| Achromatopsia (no color) | #515151 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D93
#663D93
oklch(45.1% 0.138 303.3)
- #4A5F00
#4A5F00
oklch(45.2% 0.111 123.3)
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 #663D93, 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 0.065
- Light Eggplant #894585 ΔE 0.078
- Dusk #4E5481 ΔE 0.080
- Bluey Purple #6241C7 ΔE 0.084
- Blue With A Hint Of Purple #533CC6 ΔE 0.090
Use #663D93 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.