#66577B
Closest named color: Dusty Grape (#545775). oklch(48.6% 0.059 303.3), rgb(102, 87, 123).
Aa
White text reads best on this color (6.53:1).
About this color
#66577B is a medium-dark, muted purple. In OKLCH its lightness is 49%, its chroma 0.059 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.031 away. White text reads best on it, at 6.53:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.059) |
| Temperature | in between |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #66577B |
| RGB | rgb(102, 87, 123) |
| HSL | hsl(265, 17%, 41%) |
| OKLCH | oklch(48.6% 0.059 303.3) |
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 #66577B | 6.53:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #66577B | 3.21:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #66577B text on white | 6.53:1 | AA | Lc 82.4 | Fine for body text |
| #66577B text on black | 3.21:1 | AA large text | Lc -19.6 | 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
#EBE9EE
oklch(93.7% 0.007 304.2)
-
Step 200
200
#DBD7E2
oklch(88.6% 0.016 302.5)
-
Step 300
300
#C4BCD0
oklch(80.8% 0.029 303.8)
-
Step 400
400
#A69AB9
oklch(70.7% 0.046 302.8)
-
Step 500
500
#9181A7
oklch(63.1% 0.059 303.9)
-
Step 600
600
#7B6A92
oklch(55.5% 0.064 303.8)
-
Step 700
700 (this color)
#66577B
oklch(48.6% 0.059 303.3)
-
Step 800
800
#544865
oklch(42.5% 0.049 303.3)
-
Step 900
900
#463D52
oklch(37.8% 0.037 304.2)
-
Step 950
950
#292430
oklch(27.1% 0.023 303.9)
#66577B 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) | #505D7C | 0.036 |
| Deuteranopia (no green cones) | #535E7A | 0.034 |
| Tritanopia (no blue cones) | #635C64 | 0.045 |
| Achromatopsia (no color) | #5E5E5E | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66577B
#66577B
oklch(48.6% 0.059 303.3)
- #58653F
#58653F
oklch(48.5% 0.059 123.9)
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 #66577B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.031
- Dusk #4E5481 ΔE 0.041
- Muted Purple #805B87 ΔE 0.050
- Twilight #4E518B ΔE 0.053
- Dull Purple #84597E ΔE 0.053
- YInMn Blue #415A77 ΔE 0.056
- Slate #516572 ΔE 0.056
- Dusty Purple #825F87 ΔE 0.057
Use #66577B 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.