#663285
Closest named color: Rebecca Purple (#663399). oklch(42.5% 0.139 310.7), rgb(102, 50, 133).
Aa
White text reads best on this color (8.89:1).
About this color
#663285 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.139 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.033 away. White text reads best on it, at 8.89:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.35:1 |
| White text | 8.89:1 |
Values
| HEX | #663285 |
| RGB | rgb(102, 50, 133) |
| HSL | hsl(278, 45%, 36%) |
| OKLCH | oklch(42.5% 0.139 310.7) |
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 #663285 | 8.89:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #663285 | 2.35:1 | Fails | Lc 14.1 | Not readable |
| #663285 text on white | 8.89:1 | AAA | Lc 89.9 | Fine for body text |
| #663285 text on black | 2.35:1 | Fails | Lc -12.3 | 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
#F8F4FB
oklch(97.2% 0.01 311.2)
-
Step 100
100
#EFE6F6
oklch(93.7% 0.023 310.7)
-
Step 200
200
#E3D1F0
oklch(88.5% 0.046 311.2)
-
Step 300
300
#D1B2E8
oklch(80.8% 0.082 310.5)
-
Step 400
400
#BA88DC
oklch(70.6% 0.13 310.7)
-
Step 500
500
#A968D2
oklch(63.1% 0.165 310.8)
-
Step 600
600
#944CBF
oklch(55.5% 0.18 310.7)
-
Step 700
700
#7E3CA5
oklch(49% 0.168 310.6)
-
Step 800
800 (this color)
#663285
oklch(42.5% 0.139 310.7)
-
Step 900
900
#542E6B
oklch(37.8% 0.107 311.1)
-
Step 950
950
#311B3F
oklch(27% 0.069 310.8)
#663285 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) | #114788 | 0.123 |
| Deuteranopia (no green cones) | #2A4B83 | 0.108 |
| Tritanopia (no blue cones) | #624256 | 0.097 |
| Achromatopsia (no color) | #4A4A4A | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663285
#663285
oklch(42.5% 0.139 310.7)
- #375A00
#375A00
oklch(42.4% 0.116 130.8)
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 #663285, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.059
- Blueberry #464196 ΔE 0.069
- Purple #800080 ΔE 0.074
- Twilight #4E518B ΔE 0.083
- Light Eggplant #894585 ΔE 0.087
- Dark Magenta #8B008B ΔE 0.087
- Chrysanthemum #560BAD ΔE 0.094
Use #663285 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.