#6638AD
Closest named color: Rebecca Purple (#663399). oklch(46.2% 0.177 296.9), rgb(102, 56, 173).
Aa
White text reads best on this color (7.68:1).
About this color
#6638AD is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.177 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 7.68:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #6638AD |
| RGB | rgb(102, 56, 173) |
| HSL | hsl(264, 51%, 45%) |
| OKLCH | oklch(46.2% 0.177 296.9) |
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 #6638AD | 7.68:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #6638AD | 2.73:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #6638AD text on white | 7.68:1 | AAA | Lc 86.1 | Fine for body text |
| #6638AD text on black | 2.73:1 | Fails | Lc -16.0 | 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
#C6B5F2
oklch(80.8% 0.087 297.2)
-
Step 400
400
#AA8DEB
oklch(70.7% 0.137 297)
-
Step 500
500
#966DE5
oklch(63.1% 0.176 296.8)
-
Step 600
600
#8252D3
oklch(55.7% 0.19 296.9)
-
Step 700
700 (this color)
#6638AD
oklch(46.2% 0.177 296.9)
-
Step 800
800
#593794
oklch(42.8% 0.146 296.5)
-
Step 900
900
#493176
oklch(37.8% 0.114 296.6)
-
Step 950
950
#2B1D45
oklch(27% 0.073 297.5)
#6638AD 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 | 0.117 |
| Deuteranopia (no green cones) | #0052AB | 0.117 |
| Tritanopia (no blue cones) | #54546E | 0.136 |
| Achromatopsia (no color) | #535353 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6638AD
#6638AD
oklch(46.2% 0.177 296.9)
- #556000
#556000
oklch(46.3% 0.107 117.2)
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 #6638AD, 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
- Grape #7209B7 ΔE 0.059
- Blurple #5539CC ΔE 0.059
- Purple Blue #5D21D0 ΔE 0.068
- Blueberry #464196 ΔE 0.068
- Chrysanthemum #560BAD ΔE 0.072
Use #6638AD 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.