#66537C
Closest named color: Dusty Grape (#545775). oklch(47.8% 0.068 305.2), rgb(102, 83, 124).
Aa
White text reads best on this color (6.78:1).
About this color
#66537C is a medium-dark, muted purple. In OKLCH its lightness is 48%, its chroma 0.068 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.034 away. White text reads best on it, at 6.78:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.068) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #66537C |
| RGB | rgb(102, 83, 124) |
| HSL | hsl(268, 20%, 41%) |
| OKLCH | oklch(47.8% 0.068 305.2) |
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 #66537C | 6.78:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #66537C | 3.09:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #66537C text on white | 6.78:1 | AA | Lc 83.4 | Fine for body text |
| #66537C text on black | 3.09:1 | AA large text | Lc -18.6 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EBE8EF
oklch(93.5% 0.01 305.4)
-
Step 200
200
#DCD6E3
oklch(88.5% 0.019 306.6)
-
Step 300
300
#C5BCD2
oklch(80.9% 0.032 304.2)
-
Step 400
400
#A899BC
oklch(70.8% 0.053 304.5)
-
Step 500
500
#937FAB
oklch(63.1% 0.069 305.2)
-
Step 600
600
#7D6896
oklch(55.5% 0.074 305)
-
Step 700
700 (this color)
#66537C
oklch(47.8% 0.068 305.2)
-
Step 800
800
#564768
oklch(42.7% 0.057 304.9)
-
Step 900
900
#473C55
oklch(37.8% 0.044 304.5)
-
Step 950
950
#2A2331
oklch(27% 0.027 307.3)
#66537C 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) | #4B5A7E | 0.044 |
| Deuteranopia (no green cones) | #4F5B7B | 0.041 |
| Tritanopia (no blue cones) | #635962 | 0.051 |
| Achromatopsia (no color) | #5B5B5B | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66537C
#66537C
oklch(47.8% 0.068 305.2)
- #546438
#546438
oklch(47.8% 0.069 125.2)
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 #66537C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.034
- Dusk #4E5481 ΔE 0.039
- Twilight #4E518B ΔE 0.047
- Muted Purple #805B87 ΔE 0.054
- Dull Purple #84597E ΔE 0.057
- YInMn Blue #415A77 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.060
- Dusty Purple #825F87 ΔE 0.062
Use #66537C 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.