#66558E
Closest named color: Twilight (#4E518B). oklch(49.1% 0.091 296.6), rgb(102, 85, 142).
Aa
White text reads best on this color (6.45:1).
About this color
#66558E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.091 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.041 away. White text reads best on it, at 6.45:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #66558E |
| RGB | rgb(102, 85, 142) |
| HSL | hsl(258, 25%, 45%) |
| OKLCH | oklch(49.1% 0.091 296.6) |
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 #66558E | 6.45:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #66558E | 3.25:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #66558E text on white | 6.45:1 | AA | Lc 82.0 | Fine for body text |
| #66558E text on black | 3.25:1 | AA large text | Lc -19.9 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#DAD6E8
oklch(88.5% 0.025 296.1)
-
Step 300
300
#C3BBDA
oklch(80.8% 0.044 297.2)
-
Step 400
400
#A598C8
oklch(70.8% 0.07 297)
-
Step 500
500
#8F7EBA
oklch(63.2% 0.09 296.8)
-
Step 600
600
#7967A6
oklch(55.7% 0.097 296.2)
-
Step 700
700 (this color)
#66558E
oklch(49.1% 0.091 296.6)
-
Step 800
800
#534673
oklch(42.7% 0.074 296.4)
-
Step 900
900
#453B5D
oklch(37.8% 0.058 297.1)
-
Step 950
950
#282337
oklch(27.1% 0.037 295.3)
#66558E 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) | #465F90 | 0.051 |
| Deuteranopia (no green cones) | #485E8D | 0.049 |
| Tritanopia (no blue cones) | #5E5F6B | 0.073 |
| Achromatopsia (no color) | #5E5E5E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66558E
#66558E
oklch(49.1% 0.091 296.6)
- #5E6724
#5E6724
oklch(49.1% 0.091 116.3)
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 #66558E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.041
- Dusk #4E5481 ΔE 0.045
- Dusky Blue #475F94 ΔE 0.050
- Muted Purple #805B87 ΔE 0.051
- Dusty Grape #545775 ΔE 0.053
- Dusty Purple #825F87 ΔE 0.060
- Denim Blue #3B5B92 ΔE 0.061
- Dull Purple #84597E ΔE 0.061
Use #66558E 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.