#66619B
Closest named color: Dusky Blue (#475F94). oklch(52.2% 0.09 286.8), rgb(102, 97, 155).
Aa
White text reads best on this color (5.60:1).
About this color
#66619B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 52%, its chroma 0.090 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.047 away. White text reads best on it, at 5.60:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #66619B |
| RGB | rgb(102, 97, 155) |
| HSL | hsl(245, 23%, 49%) |
| OKLCH | oklch(52.2% 0.09 286.8) |
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 #66619B | 5.60:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #66619B | 3.74:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #66619B text on white | 5.60:1 | AA | Lc 78.0 | Fine for body text |
| #66619B text on black | 3.74:1 | AA large text | Lc -23.8 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D7D7E9
oklch(88.5% 0.025 285.9)
-
Step 300
300
#BEBDDC
oklch(80.9% 0.043 286.9)
-
Step 400
400
#9D9ACB
oklch(70.6% 0.071 287.2)
-
Step 500
500
#8581BD
oklch(63% 0.089 286.6)
-
Step 600
600
#6F6AA9
oklch(55.6% 0.097 286.4)
-
Step 700
700 (this color)
#66619B
oklch(52.2% 0.09 286.8)
-
Step 800
800
#4C4876
oklch(42.7% 0.075 286.7)
-
Step 900
900
#3F3D5F
oklch(37.7% 0.058 286)
-
Step 950
950
#252438
oklch(27.1% 0.037 286)
#66619B 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) | #4F699D | 0.036 |
| Deuteranopia (no green cones) | #4E669A | 0.035 |
| Tritanopia (no blue cones) | #596C77 | 0.077 |
| Achromatopsia (no color) | #686868 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66619B
#66619B
oklch(52.2% 0.09 286.8)
- #706D28
#706D28
oklch(52.3% 0.09 106.8)
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 #66619B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.047
- Muted Purple #805B87 ΔE 0.051
- French Blue #436BAD ΔE 0.053
- Dusty Purple #825F87 ΔE 0.054
- Dark Lavender #856798 ΔE 0.055
- Twilight #4E518B ΔE 0.064
- Denim #3B638C ΔE 0.064
- Muted Blue #3B719F ΔE 0.064
Use #66619B 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.