#66287C
Closest named color: Rebecca Purple (#663399). oklch(40.5% 0.144 316), rgb(102, 40, 124).
Aa
White text reads best on this color (9.72:1).
About this color
#66287C is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.144 and its hue 316°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.051 away. White text reads best on it, at 9.72:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #66287C |
| RGB | rgb(102, 40, 124) |
| HSL | hsl(284, 51%, 32%) |
| OKLCH | oklch(40.5% 0.144 316) |
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 #66287C | 9.72:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #66287C | 2.15:1 | Fails | Lc 12.1 | Not readable |
| #66287C text on white | 9.72:1 | AAA | Lc 91.9 | Preferred for body text |
| #66287C text on black | 2.15:1 | Fails | Lc -10.5 | 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
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#F0E5F5
oklch(93.5% 0.024 315.5)
-
Step 200
200
#E6D0EE
oklch(88.5% 0.047 317.1)
-
Step 300
300
#D6B0E6
oklch(80.8% 0.085 315.8)
-
Step 400
400
#C185D9
oklch(70.7% 0.135 315.9)
-
Step 500
500
#B163CE
oklch(63.1% 0.172 316.1)
-
Step 600
600
#9C47BB
oklch(55.6% 0.186 315.9)
-
Step 700
700
#8537A1
oklch(49% 0.173 315.9)
-
Step 800
800 (this color)
#66287C
oklch(40.5% 0.144 316)
-
Step 900
900
#582B69
oklch(37.7% 0.112 315.9)
-
Step 950
950
#341A3D
oklch(27.1% 0.07 316.8)
#66287C 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) | #04407F | 0.139 |
| Deuteranopia (no green cones) | #28467A | 0.119 |
| Tritanopia (no blue cones) | #65384E | 0.094 |
| Achromatopsia (no color) | #444444 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66287C
#66287C
oklch(40.5% 0.144 316)
- #275700
#275700
oklch(40.7% 0.121 136)
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 #66287C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.051
- Purple #800080 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.073
- Rich Purple #720058 ΔE 0.076
- Grape Purple #5D1451 ΔE 0.080
- Dark Magenta #8B008B ΔE 0.083
- Velvet #750851 ΔE 0.084
- Indigo #4B0082 ΔE 0.085
Use #66287C 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.