#663796
Closest named color: Rebecca Purple (#663399). oklch(44.4% 0.151 303.6), rgb(102, 55, 150).
Aa
White text reads best on this color (8.22:1).
About this color
#663796 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.151 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 0.010 away. White text reads best on it, at 8.22:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #663796 |
| RGB | rgb(102, 55, 150) |
| HSL | hsl(270, 46%, 40%) |
| OKLCH | oklch(44.4% 0.151 303.6) |
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 #663796 | 8.22:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #663796 | 2.55:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #663796 text on white | 8.22:1 | AAA | Lc 88.0 | Fine for body text |
| #663796 text on black | 2.55:1 | Fails | Lc -14.2 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F8
oklch(93.6% 0.025 303.5)
-
Step 200
200
#E0D2F4
oklch(88.6% 0.048 304.1)
-
Step 300
300
#CCB3F0
oklch(80.9% 0.088 303.2)
-
Step 400
400
#B389E8
oklch(70.7% 0.141 303.4)
-
Step 500
500
#A168E1
oklch(63.1% 0.18 303.4)
-
Step 600
600
#8D4BCE
oklch(55.6% 0.196 303.8)
-
Step 700
700
#783BB3
oklch(49.1% 0.183 303.7)
-
Step 800
800 (this color)
#663796
oklch(44.4% 0.151 303.6)
-
Step 900
900
#4F2D73
oklch(37.6% 0.117 303.7)
-
Step 950
950
#2E1B44
oklch(26.9% 0.076 303.1)
#663796 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) | #004E99 | 0.122 |
| Deuteranopia (no green cones) | #1D4F94 | 0.111 |
| Tritanopia (no blue cones) | #5D4B61 | 0.111 |
| Achromatopsia (no color) | #4F4F4F | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663796
#663796
oklch(44.4% 0.151 303.6)
- #485D00
#485D00
oklch(44.5% 0.11 123.5)
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 #663796, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.010
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.077
- Grape #7209B7 ΔE 0.077
- Bluey Purple #6241C7 ΔE 0.081
- Chrysanthemum #560BAD ΔE 0.082
- Blue With A Hint Of Purple #533CC6 ΔE 0.086
Use #663796 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.