#663775
Closest named color: Rebecca Purple (#663399). oklch(42.2% 0.112 317.5), rgb(102, 55, 117).
Aa
White text reads best on this color (8.86:1).
About this color
#663775 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.112 and its hue 317°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.061 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.36:1 |
| White text | 8.86:1 |
Values
| HEX | #663775 |
| RGB | rgb(102, 55, 117) |
| HSL | hsl(285, 36%, 34%) |
| OKLCH | oklch(42.2% 0.112 317.5) |
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 #663775 | 8.86:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #663775 | 2.36:1 | Fails | Lc 14.0 | Not readable |
| #663775 text on white | 8.86:1 | AAA | Lc 90.0 | Fine for body text |
| #663775 text on black | 2.36:1 | 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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#EFE6F2
oklch(93.5% 0.019 317.7)
-
Step 200
200
#E3D2E9
oklch(88.4% 0.036 317.3)
-
Step 300
300
#D2B4DD
oklch(80.9% 0.065 316.9)
-
Step 400
400
#BB8CCB
oklch(70.7% 0.103 317.3)
-
Step 500
500
#AA6EBE
oklch(63.2% 0.133 317.3)
-
Step 600
600
#9554AA
oklch(55.6% 0.145 317.4)
-
Step 700
700
#7F4492
oklch(49.1% 0.135 317.4)
-
Step 800
800 (this color)
#663775
oklch(42.2% 0.112 317.5)
-
Step 900
900
#543160
oklch(37.7% 0.088 317)
-
Step 950
950
#311D38
oklch(26.9% 0.055 317)
#663775 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) | #2B4777 | 0.100 |
| Deuteranopia (no green cones) | #394C73 | 0.090 |
| Tritanopia (no blue cones) | #664050 | 0.073 |
| Achromatopsia (no color) | #4A4A4A | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663775
#663775
oklch(42.2% 0.112 317.5)
- #2C5B16
#2C5B16
oklch(42.2% 0.111 137.5)
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 #663775, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.066
- Twilight #4E518B ΔE 0.078
- Blueberry #464196 ΔE 0.079
- Light Eggplant #894585 ΔE 0.082
- Dusk #4E5481 ΔE 0.082
- Purple #800080 ΔE 0.086
- Brownish Purple #76424E ΔE 0.086
Use #663775 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.