#66367F
Closest named color: Rebecca Purple (#663399). oklch(42.7% 0.125 312.6), rgb(102, 54, 127).
Aa
White text reads best on this color (8.75:1).
About this color
#66367F is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.125 and its hue 313°. 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 8.75:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #66367F |
| RGB | rgb(102, 54, 127) |
| HSL | hsl(279, 40%, 35%) |
| OKLCH | oklch(42.7% 0.125 312.6) |
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 #66367F | 8.75:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #66367F | 2.39:1 | Fails | Lc 14.4 | Not readable |
| #66367F text on white | 8.75:1 | AAA | Lc 89.6 | Fine for body text |
| #66367F text on black | 2.39:1 | Fails | Lc -12.6 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F4
oklch(93.6% 0.021 313.8)
-
Step 200
200
#E2D2ED
oklch(88.5% 0.04 311.7)
-
Step 300
300
#D1B3E3
oklch(80.8% 0.074 312.7)
-
Step 400
400
#BA8AD5
oklch(70.7% 0.118 312.8)
-
Step 500
500
#A86BC9
oklch(63% 0.149 312.7)
-
Step 600
600
#9351B6
oklch(55.6% 0.162 312.5)
-
Step 700
700
#7E419D
oklch(49.2% 0.151 312.8)
-
Step 800
800 (this color)
#66367F
oklch(42.7% 0.125 312.6)
-
Step 900
900
#533066
oklch(37.7% 0.097 312.5)
-
Step 950
950
#311C3C
oklch(27% 0.063 313.1)
#66367F 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) | #214881 | 0.109 |
| Deuteranopia (no green cones) | #324C7D | 0.097 |
| Tritanopia (no blue cones) | #634255 | 0.084 |
| Achromatopsia (no color) | #4B4B4B | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66367F
#66367F
oklch(42.7% 0.125 312.6)
- #335C00
#335C00
oklch(42.8% 0.12 132.9)
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 #66367F, 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 0.059
- Blueberry #464196 ΔE 0.070
- Twilight #4E518B ΔE 0.076
- Purple #800080 ΔE 0.081
- Light Eggplant #894585 ΔE 0.081
- Dusk #4E5481 ΔE 0.085
- Dark Magenta #8B008B ΔE 0.094
Use #66367F 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.