#66568B
Closest named color: Twilight (#4E518B). oklch(49.1% 0.085 297.1), rgb(102, 86, 139).
Aa
White text reads best on this color (6.42:1).
About this color
#66568B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.085 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.042 away. White text reads best on it, at 6.42:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.085) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #66568B |
| RGB | rgb(102, 86, 139) |
| HSL | hsl(258, 24%, 44%) |
| OKLCH | oklch(49.1% 0.085 297.1) |
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 #66568B | 6.42:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #66568B | 3.26:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #66568B text on white | 6.42:1 | AA | Lc 81.8 | Fine for body text |
| #66568B text on black | 3.26:1 | AA large text | Lc -20.0 | 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
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#DAD6E7
oklch(88.4% 0.023 296.7)
-
Step 300
300
#C3BCD8
oklch(81% 0.04 296.9)
-
Step 400
400
#A498C5
oklch(70.6% 0.066 296.9)
-
Step 500
500
#8F7FB6
oklch(63.2% 0.083 297.3)
-
Step 600
600
#7967A2
oklch(55.5% 0.092 297.4)
-
Step 700
700 (this color)
#66568B
oklch(49.1% 0.085 297.1)
-
Step 800
800
#534671
oklch(42.6% 0.071 297.2)
-
Step 900
900
#453B5B
oklch(37.7% 0.055 298.1)
-
Step 950
950
#282335
oklch(27% 0.034 296.8)
#66568B 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) | #485F8D | 0.048 |
| Deuteranopia (no green cones) | #4B5E8A | 0.044 |
| Tritanopia (no blue cones) | #5F5F6A | 0.068 |
| Achromatopsia (no color) | #5F5F5F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66568B
#66568B
oklch(49.1% 0.085 297.1)
- #5D672A
#5D672A
oklch(49.1% 0.085 117.4)
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 #66568B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.042
- Dusk #4E5481 ΔE 0.043
- Dusty Grape #545775 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.049
- Muted Purple #805B87 ΔE 0.049
- Dusty Purple #825F87 ΔE 0.057
- Dull Purple #84597E ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.061
Use #66568B 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.