#6636A7
Closest named color: Rebecca Purple (#663399). oklch(45.5% 0.172 298.8), rgb(102, 54, 167).
Aa
White text reads best on this color (7.92:1).
About this color
#6636A7 is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.172 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.023 away. White text reads best on it, at 7.92:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.65:1 |
| White text | 7.92:1 |
Values
| HEX | #6636A7 |
| RGB | rgb(102, 54, 167) |
| HSL | hsl(265, 51%, 43%) |
| OKLCH | oklch(45.5% 0.172 298.8) |
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 #6636A7 | 7.92:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #6636A7 | 2.65:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #6636A7 text on white | 7.92:1 | AAA | Lc 86.9 | Fine for body text |
| #6636A7 text on black | 2.65:1 | Fails | Lc -15.2 | 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 800.
-
Step 50
50
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FB
oklch(93.6% 0.029 298.9)
-
Step 200
200
#DED2FA
oklch(88.6% 0.056 299)
-
Step 300
300
#C9B2F9
oklch(80.8% 0.101 299)
-
Step 400
400
#AF87F6
oklch(70.7% 0.161 298.9)
-
Step 500
500
#9D63F2
oklch(63% 0.207 299.1)
-
Step 600
600
#8944E1
oklch(55.6% 0.225 299)
-
Step 700
700
#7434C3
oklch(49.1% 0.208 298.8)
-
Step 800
800 (this color)
#6636A7
oklch(45.5% 0.172 298.8)
-
Step 900
900
#4D2A7D
oklch(37.6% 0.135 299.2)
-
Step 950
950
#2D1A49
oklch(27% 0.084 299.3)
#6636A7 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) | #0051AA | 0.119 |
| Deuteranopia (no green cones) | #0050A5 | 0.120 |
| Tritanopia (no blue cones) | #57506A | 0.130 |
| Achromatopsia (no color) | #515151 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6636A7
#6636A7
oklch(45.5% 0.172 298.8)
- #515E00
#515E00
oklch(45.5% 0.106 118.6)
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 #6636A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.023
- Bluey Purple #6241C7 ΔE 0.056
- Grape #7209B7 ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Blueberry #464196 ΔE 0.065
- Blurple #5539CC ΔE 0.068
- Chrysanthemum #560BAD ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.071
Use #6636A7 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.