#6639AD
Closest named color: Rebecca Purple (#663399). oklch(46.4% 0.176 296.8), rgb(102, 57, 173).
Aa
White text reads best on this color (7.62:1).
About this color
#6639AD is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.176 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.034 away. White text reads best on it, at 7.62:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #6639AD |
| RGB | rgb(102, 57, 173) |
| HSL | hsl(263, 50%, 45%) |
| OKLCH | oklch(46.4% 0.176 296.8) |
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 #6639AD | 7.62:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #6639AD | 2.75:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #6639AD text on white | 7.62:1 | AAA | Lc 85.9 | Fine for body text |
| #6639AD text on black | 2.75:1 | Fails | Lc -16.1 | 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 700.
-
Step 50
50
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DCD3F5
oklch(88.5% 0.047 297.5)
-
Step 300
300
#C6B6F2
oklch(81% 0.085 296.7)
-
Step 400
400
#AA8DEB
oklch(70.7% 0.137 297)
-
Step 500
500
#966EE4
oklch(63.2% 0.173 296.8)
-
Step 600
600
#8152D2
oklch(55.6% 0.189 296.7)
-
Step 700
700 (this color)
#6639AD
oklch(46.4% 0.176 296.8)
-
Step 800
800
#593793
oklch(42.7% 0.145 296.8)
-
Step 900
900
#493175
oklch(37.7% 0.112 297)
-
Step 950
950
#2A1D45
oklch(26.9% 0.073 296.2)
#6639AD 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) | #0054B1 | 0.116 |
| Deuteranopia (no green cones) | #0052AB | 0.116 |
| Tritanopia (no blue cones) | #54546E | 0.135 |
| Achromatopsia (no color) | #545454 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6639AD
#6639AD
oklch(46.4% 0.176 296.8)
- #566000
#566000
oklch(46.4% 0.107 116.6)
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 #6639AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.034
- Bluey Purple #6241C7 ΔE 0.045
- Blue With A Hint Of Purple #533CC6 ΔE 0.053
- Blurple #5539CC ΔE 0.059
- Grape #7209B7 ΔE 0.061
- Blueberry #464196 ΔE 0.067
- Purple Blue #5D21D0 ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.073
Use #6639AD 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.