#66537A
Closest named color: Dusty Grape (#545775). oklch(47.7% 0.065 306.3), rgb(102, 83, 122).
Aa
White text reads best on this color (6.81:1).
About this color
#66537A is a medium-dark, muted purple. In OKLCH its lightness is 48%, its chroma 0.065 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.033 away. White text reads best on it, at 6.81:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.065) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #66537A |
| RGB | rgb(102, 83, 122) |
| HSL | hsl(269, 19%, 40%) |
| OKLCH | oklch(47.7% 0.065 306.3) |
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 #66537A | 6.81:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #66537A | 3.08:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #66537A text on white | 6.81:1 | AA | Lc 83.5 | Fine for body text |
| #66537A text on black | 3.08:1 | AA large text | Lc -18.5 | 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
#C6BCD1
oklch(81% 0.031 307)
-
Step 400
400
#A899BA
oklch(70.7% 0.05 305.7)
-
Step 500
500
#9380A9
oklch(63.2% 0.064 305.7)
-
Step 600
600
#7E6994
oklch(55.7% 0.07 306.5)
-
Step 700
700 (this color)
#66537A
oklch(47.7% 0.065 306.3)
-
Step 800
800
#564767
oklch(42.6% 0.055 305.6)
-
Step 900
900
#473C53
oklch(37.7% 0.041 306.3)
-
Step 950
950
#2A2331
oklch(27% 0.027 307.3)
#66537A 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) | #4C5A7C | 0.043 |
| Deuteranopia (no green cones) | #4F5B79 | 0.041 |
| Tritanopia (no blue cones) | #635961 | 0.050 |
| Achromatopsia (no color) | #5B5B5B | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66537A
#66537A
oklch(47.7% 0.065 306.3)
- #53643A
#53643A
oklch(47.8% 0.067 126.7)
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 #66537A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.033
- Dusk #4E5481 ΔE 0.039
- Twilight #4E518B ΔE 0.049
- Muted Purple #805B87 ΔE 0.055
- Dull Purple #84597E ΔE 0.057
- YInMn Blue #415A77 ΔE 0.058
- Dusky Blue #475F94 ΔE 0.062
- Dusty Purple #825F87 ΔE 0.063
Use #66537A 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.