#66339E
Closest named color: Rebecca Purple (#663399). oklch(44.4% 0.166 301.9), rgb(102, 51, 158).
Aa
White text reads best on this color (8.29:1).
About this color
#66339E is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.166 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.008 away. White text reads best on it, at 8.29:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #66339E |
| RGB | rgb(102, 51, 158) |
| HSL | hsl(269, 51%, 41%) |
| OKLCH | oklch(44.4% 0.166 301.9) |
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 #66339E | 8.29:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #66339E | 2.53:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #66339E text on white | 8.29:1 | AAA | Lc 88.0 | Fine for body text |
| #66339E text on black | 2.53:1 | Fails | Lc -14.1 | 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
#EDE6FA
oklch(93.6% 0.028 301.7)
-
Step 200
200
#DFD1F8
oklch(88.4% 0.055 301.6)
-
Step 300
300
#CCB2F5
oklch(80.9% 0.097 302.1)
-
Step 400
400
#B387F0
oklch(70.8% 0.154 301.9)
-
Step 500
500
#A164EB
oklch(63.2% 0.198 301.9)
-
Step 600
600
#8D45D9
oklch(55.6% 0.215 302.1)
-
Step 700
700
#7835BD
oklch(49.2% 0.201 301.8)
-
Step 800
800 (this color)
#66339E
oklch(44.4% 0.166 301.9)
-
Step 900
900
#4F2B79
oklch(37.7% 0.128 301.8)
-
Step 950
950
#2E1A47
oklch(27% 0.082 301.7)
#66339E 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) | #004DA1 | 0.123 |
| Deuteranopia (no green cones) | #004E9C | 0.125 |
| Tritanopia (no blue cones) | #5A4B64 | 0.123 |
| Achromatopsia (no color) | #4E4E4E | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66339E
#66339E
oklch(44.4% 0.166 301.9)
- #4A5C00
#4A5C00
oklch(44.4% 0.107 121.9)
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 #66339E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.008
- Grape #7209B7 ΔE 0.063
- Blueberry #464196 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.064
- Chrysanthemum #560BAD ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.071
- Blue With A Hint Of Purple #533CC6 ΔE 0.075
- Blurple #5539CC ΔE 0.082
Use #66339E 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.