#66307E
Closest named color: Rebecca Purple (#663399). oklch(41.7% 0.134 314.1), rgb(102, 48, 126).
Aa
White text reads best on this color (9.17:1).
About this color
#66307E is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.134 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.044 away. White text reads best on it, at 9.17:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.134) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #66307E |
| RGB | rgb(102, 48, 126) |
| HSL | hsl(282, 45%, 34%) |
| OKLCH | oklch(41.7% 0.134 314.1) |
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 #66307E | 9.17:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #66307E | 2.28:1 | Fails | Lc 13.3 | Not readable |
| #66307E text on white | 9.17:1 | AAA | Lc 90.7 | Preferred for body text |
| #66307E text on black | 2.28:1 | Fails | Lc -11.6 | 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
#F8F3FA
oklch(97% 0.011 316.5)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E4D1EE
oklch(88.5% 0.044 314.1)
-
Step 300
300
#D3B2E4
oklch(80.9% 0.078 314.1)
-
Step 400
400
#BD88D7
oklch(70.7% 0.125 314.1)
-
Step 500
500
#AC68CC
oklch(63.1% 0.16 314)
-
Step 600
600
#974CB9
oklch(55.5% 0.175 313.9)
-
Step 700
700
#813D9F
oklch(49.1% 0.161 314.1)
-
Step 800
800 (this color)
#66307E
oklch(41.7% 0.134 314.1)
-
Step 900
900
#552E68
oklch(37.8% 0.104 313.5)
-
Step 950
950
#321B3D
oklch(27% 0.067 313.9)
#66307E 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) | #174580 | 0.122 |
| Deuteranopia (no green cones) | #2D497C | 0.107 |
| Tritanopia (no blue cones) | #643E52 | 0.090 |
| Achromatopsia (no color) | #484848 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66307E
#66307E
oklch(41.7% 0.134 314.1)
- #2E5900
#2E5900
oklch(41.6% 0.12 134.1)
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 #66307E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.063
- Purple #800080 ΔE 0.072
- Blueberry #464196 ΔE 0.076
- Rich Purple #720058 ΔE 0.087
- Dark Magenta #8B008B ΔE 0.088
- Twilight #4E518B ΔE 0.088
- Light Eggplant #894585 ΔE 0.089
Use #66307E 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.