#666188
Closest named color: Muted Purple (#805B87). oklch(51.3% 0.061 289.9), rgb(102, 97, 136).
Aa
White text reads best on this color (5.78:1).
About this color
#666188 is a medium-dark, muted purple. In OKLCH its lightness is 51%, its chroma 0.061 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Purple (#805B87), ΔE 0.044 away. White text reads best on it, at 5.78:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Muted Purple (#805B87) |
| Black text | 3.63:1 |
| White text | 5.78:1 |
Values
| HEX | #666188 |
| RGB | rgb(102, 97, 136) |
| HSL | hsl(248, 17%, 46%) |
| OKLCH | oklch(51.3% 0.061 289.9) |
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 #666188 | 5.78:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #666188 | 3.63:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #666188 text on white | 5.78:1 | AA | Lc 78.9 | Fine for body text |
| #666188 text on black | 3.63:1 | AA large text | Lc -22.9 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D8D7E4
oklch(88.4% 0.018 289.6)
-
Step 300
300
#C0BED3
oklch(81% 0.029 290.1)
-
Step 400
400
#A09CBD
oklch(70.7% 0.048 290.7)
-
Step 500
500
#8884AC
oklch(63.1% 0.06 289.1)
-
Step 600
600
#726D98
oklch(55.6% 0.066 289.4)
-
Step 700
700 (this color)
#666188
oklch(51.3% 0.061 289.9)
-
Step 800
800
#4E4A69
oklch(42.6% 0.051 290)
-
Step 900
900
#413E55
oklch(37.6% 0.039 290.4)
-
Step 950
950
#262432
oklch(26.9% 0.026 291.1)
#666188 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) | #57668A | 0.024 |
| Deuteranopia (no green cones) | #576587 | 0.024 |
| Tritanopia (no blue cones) | #5F686F | 0.052 |
| Achromatopsia (no color) | #666666 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666188
#666188
oklch(51.3% 0.061 289.9)
- #696A40
#696A40
oklch(51.3% 0.061 109.5)
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 #666188, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Purple #805B87 ΔE 0.044
- Dusty Purple #825F87 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.049
- Dusty Grape #545775 ΔE 0.049
- Slate #516572 ΔE 0.052
- Dull Purple #84597E ΔE 0.053
- Dusk #4E5481 ΔE 0.056
- Metallic Blue #4F738E ΔE 0.056
Use #666188 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.