#66566B
Closest named color: Dusty Grape (#545775). oklch(47.7% 0.039 318.1), rgb(102, 86, 107).
Aa
White text reads best on this color (6.75:1).
About this color
#66566B is a medium-dark, muted purple. In OKLCH its lightness is 48%, its chroma 0.039 and its hue 318°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.032 away. White text reads best on it, at 6.75:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.039) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #66566B |
| RGB | rgb(102, 86, 107) |
| HSL | hsl(286, 11%, 38%) |
| OKLCH | oklch(47.7% 0.039 318.1) |
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 #66566B | 6.75:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #66566B | 3.10:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #66566B text on white | 6.75:1 | AA | Lc 83.3 | Fine for body text |
| #66566B text on black | 3.10:1 | AA large text | Lc -18.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DCD7DE
oklch(88.5% 0.011 316.5)
-
Step 300
300
#C6BDC9
oklch(80.9% 0.019 317.7)
-
Step 400
400
#A99BAD
oklch(70.7% 0.03 318.7)
-
Step 500
500
#938399
oklch(63.2% 0.037 316.8)
-
Step 600
600
#7E6C83
oklch(55.6% 0.041 318.8)
-
Step 700
700 (this color)
#66566B
oklch(47.7% 0.039 318.1)
-
Step 800
800
#574A5B
oklch(42.9% 0.032 318.2)
-
Step 900
900
#473E4A
oklch(37.8% 0.023 317.7)
-
Step 950
950
#2A242C
oklch(27% 0.017 317.7)
#66566B 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) | #545A6C | 0.030 |
| Deuteranopia (no green cones) | #575C6A | 0.029 |
| Tritanopia (no blue cones) | #66585D | 0.026 |
| Achromatopsia (no color) | #5B5B5B | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66566B
#66566B
oklch(47.7% 0.039 318.1)
- #52624D
#52624D
oklch(47.6% 0.038 138.3)
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 #66566B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.032
- Slate #516572 ΔE 0.050
- Dusk #4E5481 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.056
- Dim Gray #696969 ΔE 0.059
- Dark Mauve #874C62 ΔE 0.061
- Dull Purple #84597E ΔE 0.062
- Brownish Purple #76424E ΔE 0.063
Use #66566B 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.