#663773
Closest named color: Rebecca Purple (#663399). oklch(42.1% 0.109 318.6), rgb(102, 55, 115).
Aa
White text reads best on this color (8.90:1).
About this color
#663773 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.109 and its hue 319°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.065 away. White text reads best on it, at 8.90:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.35:1 |
| White text | 8.90:1 |
Values
| HEX | #663773 |
| RGB | rgb(102, 55, 115) |
| HSL | hsl(287, 35%, 33%) |
| OKLCH | oklch(42.1% 0.109 318.6) |
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 #663773 | 8.90:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #663773 | 2.35:1 | Fails | Lc 13.9 | Not readable |
| #663773 text on white | 8.90:1 | AAA | Lc 90.1 | Preferred for body text |
| #663773 text on black | 2.35:1 | Fails | Lc -12.2 | 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
#D3B4DB
oklch(80.9% 0.064 319.3)
-
Step 400
400
#BC8CCA
oklch(70.7% 0.103 318.5)
-
Step 500
500
#AB6EBC
oklch(63.2% 0.131 318.7)
-
Step 600
600
#9654A8
oklch(55.6% 0.143 318.7)
-
Step 700
700
#804490
oklch(49.1% 0.133 318.9)
-
Step 800
800 (this color)
#663773
oklch(42.1% 0.109 318.6)
-
Step 900
900
#54315E
oklch(37.6% 0.085 318.5)
-
Step 950
950
#311D37
oklch(26.9% 0.054 318.2)
#663773 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) | #2C4775 | 0.099 |
| Deuteranopia (no green cones) | #3A4B71 | 0.088 |
| Tritanopia (no blue cones) | #663F4F | 0.070 |
| Achromatopsia (no color) | #4A4A4A | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663773
#663773
oklch(42.1% 0.109 318.6)
- #2B5B19
#2B5B19
oklch(42.2% 0.11 138.4)
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 #663773, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.068
- Twilight #4E518B ΔE 0.079
- Blueberry #464196 ΔE 0.081
- Light Eggplant #894585 ΔE 0.082
- Dusk #4E5481 ΔE 0.083
- Brownish Purple #76424E ΔE 0.084
- Purple #800080 ΔE 0.088
Use #663773 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.