#66367D
Closest named color: Rebecca Purple (#663399). oklch(42.6% 0.123 313.6), rgb(102, 54, 125).
Aa
White text reads best on this color (8.79:1).
About this color
#66367D is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.123 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 0.047 away. White text reads best on it, at 8.79:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.38:1 |
| White text | 8.79:1 |
Values
| HEX | #66367D |
| RGB | rgb(102, 54, 125) |
| HSL | hsl(281, 40%, 35%) |
| OKLCH | oklch(42.6% 0.123 313.6) |
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 #66367D | 8.79:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #66367D | 2.38:1 | Fails | Lc 14.2 | Not readable |
| #66367D text on white | 8.79:1 | AAA | Lc 89.7 | Fine for body text |
| #66367D text on black | 2.38:1 | Fails | Lc -12.5 | 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
#E3D2EC
oklch(88.5% 0.04 314.1)
-
Step 300
300
#D1B3E2
oklch(80.8% 0.073 313.3)
-
Step 400
400
#BA8BD3
oklch(70.8% 0.114 313.4)
-
Step 500
500
#A96CC7
oklch(63.2% 0.146 313.7)
-
Step 600
600
#9451B4
oklch(55.6% 0.16 313.6)
-
Step 700
700
#7E419B
oklch(49.1% 0.149 313.5)
-
Step 800
800 (this color)
#66367D
oklch(42.6% 0.123 313.6)
-
Step 900
900
#533065
oklch(37.7% 0.096 313.1)
-
Step 950
950
#311D3B
oklch(27.1% 0.06 313.7)
#66367D 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) | #23487F | 0.108 |
| Deuteranopia (no green cones) | #344C7B | 0.096 |
| Tritanopia (no blue cones) | #644254 | 0.083 |
| Achromatopsia (no color) | #4B4B4B | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66367D
#66367D
oklch(42.6% 0.123 313.6)
- #315C00
#315C00
oklch(42.6% 0.122 133.6)
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 #66367D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.072
- Twilight #4E518B ΔE 0.077
- Light Eggplant #894585 ΔE 0.081
- Purple #800080 ΔE 0.081
- Dusk #4E5481 ΔE 0.085
- Rich Purple #720058 ΔE 0.094
Use #66367D 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.