#66348B
Closest named color: Rebecca Purple (#663399). oklch(43.2% 0.143 308), rgb(102, 52, 139).
Aa
White text reads best on this color (8.64:1).
About this color
#66348B is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.143 and its hue 308°. 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 8.64:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #66348B |
| RGB | rgb(102, 52, 139) |
| HSL | hsl(274, 46%, 37%) |
| OKLCH | oklch(43.2% 0.143 308) |
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 #66348B | 8.64:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #66348B | 2.42:1 | Fails | Lc 14.8 | Not readable |
| #66348B text on white | 8.64:1 | AAA | Lc 89.2 | Fine for body text |
| #66348B text on black | 2.42:1 | Fails | Lc -13.0 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F7
oklch(93.6% 0.024 307)
-
Step 200
200
#E2D2F1
oklch(88.6% 0.045 308.6)
-
Step 300
300
#CFB3EB
oklch(80.9% 0.083 307.3)
-
Step 400
400
#B889E0
oklch(70.8% 0.132 308.2)
-
Step 500
500
#A668D7
oklch(63.1% 0.17 308.1)
-
Step 600
600
#914CC5
oklch(55.6% 0.186 307.7)
-
Step 700
700
#7C3CAA
oklch(49.1% 0.173 308)
-
Step 800
800 (this color)
#66348B
oklch(43.2% 0.143 308)
-
Step 900
900
#522E6E
oklch(37.8% 0.11 308)
-
Step 950
950
#301B40
oklch(26.9% 0.07 308.6)
#66348B 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) | #0B4A8E | 0.123 |
| Deuteranopia (no green cones) | #264C89 | 0.108 |
| Tritanopia (no blue cones) | #60455A | 0.101 |
| Achromatopsia (no color) | #4C4C4C | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66348B
#66348B
oklch(43.2% 0.143 308)
- #3E5B00
#3E5B00
oklch(43.2% 0.113 127.9)
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 #66348B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.023
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.064
- Purple #800080 ΔE 0.078
- Twilight #4E518B ΔE 0.080
- Light Eggplant #894585 ΔE 0.085
- Grape #7209B7 ΔE 0.088
- Dark Magenta #8B008B ΔE 0.088
Use #66348B 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.