#6636A1
Closest named color: Rebecca Purple (#663399). oklch(45% 0.165 300.5), rgb(102, 54, 161).
Aa
White text reads best on this color (8.05:1).
About this color
#6636A1 is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.165 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.014 away. White text reads best on it, at 8.05:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.165) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #6636A1 |
| RGB | rgb(102, 54, 161) |
| HSL | hsl(267, 50%, 42%) |
| OKLCH | oklch(45% 0.165 300.5) |
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 #6636A1 | 8.05:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #6636A1 | 2.60:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #6636A1 text on white | 8.05:1 | AAA | Lc 87.3 | Fine for body text |
| #6636A1 text on black | 2.60:1 | Fails | Lc -14.8 | 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
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#ECE6FA
oklch(93.6% 0.027 299.5)
-
Step 200
200
#DED2F8
oklch(88.5% 0.053 299.7)
-
Step 300
300
#CAB3F6
oklch(81% 0.096 300)
-
Step 400
400
#B187F1
oklch(70.6% 0.155 300.8)
-
Step 500
500
#9F65EC
oklch(63.2% 0.197 300.7)
-
Step 600
600
#8A47DB
oklch(55.7% 0.215 300.2)
-
Step 700
700
#7636BE
oklch(49.1% 0.201 300.6)
-
Step 800
800 (this color)
#6636A1
oklch(45% 0.165 300.5)
-
Step 900
900
#4E2B7A
oklch(37.7% 0.129 300.7)
-
Step 950
950
#2D1A47
oklch(26.8% 0.082 300.5)
#6636A1 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) | #0050A4 | 0.121 |
| Deuteranopia (no green cones) | #004F9F | 0.121 |
| Tritanopia (no blue cones) | #594E67 | 0.123 |
| Achromatopsia (no color) | #505050 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6636A1
#6636A1
oklch(45% 0.165 300.5)
- #4E5D00
#4E5D00
oklch(45% 0.107 120)
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 #6636A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.014
- Blueberry #464196 ΔE 0.061
- Grape #7209B7 ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.065
- Blue With A Hint Of Purple #533CC6 ΔE 0.070
- Chrysanthemum #560BAD ΔE 0.072
- Blurple #5539CC ΔE 0.077
Use #6636A1 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.