#66366F
Closest named color: Rebecca Purple (#663399). oklch(41.7% 0.107 321.1), rgb(102, 54, 111).
Aa
White text reads best on this color (9.04:1).
About this color
#66366F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.107 and its hue 321°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.071 away. White text reads best on it, at 9.04:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #66366F |
| RGB | rgb(102, 54, 111) |
| HSL | hsl(291, 35%, 32%) |
| OKLCH | oklch(41.7% 0.107 321.1) |
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 #66366F | 9.04:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #66366F | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #66366F text on white | 9.04:1 | AAA | Lc 90.5 | Preferred for body text |
| #66366F text on black | 2.32:1 | Fails | Lc -11.8 | 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
#F8F4F9
oklch(97.2% 0.008 319.4)
-
Step 100
100
#F0E6F1
oklch(93.6% 0.018 323)
-
Step 200
200
#E4D2E7
oklch(88.5% 0.034 321.4)
-
Step 300
300
#D4B4D9
oklch(80.9% 0.062 321.7)
-
Step 400
400
#BD8CC6
oklch(70.7% 0.099 321.1)
-
Step 500
500
#AC6EB8
oklch(63.1% 0.127 320.9)
-
Step 600
600
#9754A4
oklch(55.5% 0.139 320.9)
-
Step 700
700
#81448C
oklch(49% 0.129 321.3)
-
Step 800
800 (this color)
#66366F
oklch(41.7% 0.107 321.1)
-
Step 900
900
#55315C
oklch(37.6% 0.084 320.9)
-
Step 950
950
#321D36
oklch(26.9% 0.053 321)
#66366F 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) | #2D4571 | 0.099 |
| Deuteranopia (no green cones) | #3B4B6D | 0.089 |
| Tritanopia (no blue cones) | #673D4D | 0.066 |
| Achromatopsia (no color) | #494949 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66366F
#66366F
oklch(41.7% 0.107 321.1)
- #265A1E
#265A1E
oklch(41.7% 0.107 141.1)
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 #66366F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.072
- Brownish Purple #76424E ΔE 0.080
- Velvet #750851 ΔE 0.083
- Twilight #4E518B ΔE 0.083
- Grape Purple #5D1451 ΔE 0.084
- Rich Purple #720058 ΔE 0.084
- Purple Brown #673A3F ΔE 0.085
Use #66366F 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.