#66369E
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.162 301.3), rgb(102, 54, 158).
Aa
White text reads best on this color (8.11:1).
About this color
#66369E is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.162 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.010 away. White text reads best on it, at 8.11:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #66369E |
| RGB | rgb(102, 54, 158) |
| HSL | hsl(268, 49%, 42%) |
| OKLCH | oklch(44.8% 0.162 301.3) |
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 #66369E | 8.11:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #66369E | 2.58:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #66369E text on white | 8.11:1 | AAA | Lc 87.6 | Fine for body text |
| #66369E text on black | 2.58:1 | Fails | Lc -14.6 | 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
#DFD2F7
oklch(88.6% 0.052 301.3)
-
Step 300
300
#CBB3F4
oklch(81% 0.093 301.3)
-
Step 400
400
#B288EF
oklch(70.8% 0.151 301.5)
-
Step 500
500
#9F65E9
oklch(63% 0.194 301.3)
-
Step 600
600
#8B48D8
oklch(55.7% 0.21 301.1)
-
Step 700
700
#7637BB
oklch(49% 0.196 301.2)
-
Step 800
800 (this color)
#66369E
oklch(44.8% 0.162 301.3)
-
Step 900
900
#4E2C78
oklch(37.7% 0.125 301.2)
-
Step 950
950
#2E1B46
oklch(27.1% 0.079 301.8)
#66369E 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) | #004FA1 | 0.121 |
| Deuteranopia (no green cones) | #094F9C | 0.119 |
| Tritanopia (no blue cones) | #5A4D65 | 0.121 |
| Achromatopsia (no color) | #505050 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66369E
#66369E
oklch(44.8% 0.162 301.3)
- #4C5D00
#4C5D00
oklch(44.8% 0.108 121.2)
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 #66369E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.010
- Blueberry #464196 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.063
- Grape #7209B7 ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.074
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Blurple #5539CC ΔE 0.081
Use #66369E 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.