#66549E
Closest named color: Twilight (#4E518B). oklch(49.8% 0.116 292.9), rgb(102, 84, 158).
Aa
White text reads best on this color (6.31:1).
About this color
#66549E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.116 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.050 away. White text reads best on it, at 6.31:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.32:1 |
| White text | 6.31:1 |
Values
| HEX | #66549E |
| RGB | rgb(102, 84, 158) |
| HSL | hsl(255, 31%, 47%) |
| OKLCH | oklch(49.8% 0.116 292.9) |
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 #66549E | 6.31:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #66549E | 3.32:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #66549E text on white | 6.31:1 | AA | Lc 81.3 | Fine for body text |
| #66549E text on black | 3.32:1 | AA large text | Lc -20.6 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#EAE8F4
oklch(93.6% 0.016 293.7)
-
Step 200
200
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C1BAE2
oklch(80.8% 0.056 293.1)
-
Step 400
400
#A296D4
oklch(70.6% 0.09 292.8)
-
Step 500
500
#8C7BC8
oklch(63% 0.115 293)
-
Step 600
600
#7763B5
oklch(55.6% 0.125 293.1)
-
Step 700
700 (this color)
#66549E
oklch(49.8% 0.116 292.9)
-
Step 800
800
#51437E
oklch(42.6% 0.096 292.8)
-
Step 900
900
#433965
oklch(37.6% 0.074 292.9)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#66549E 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) | #3B61A1 | 0.064 |
| Deuteranopia (no green cones) | #3D5E9C | 0.061 |
| Tritanopia (no blue cones) | #596271 | 0.094 |
| Achromatopsia (no color) | #606060 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66549E
#66549E
oklch(49.8% 0.116 292.9)
- #646900
#646900
oklch(49.9% 0.111 113)
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 #66549E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.050
- Dusky Blue #475F94 ΔE 0.056
- Iris #6258C4 ΔE 0.060
- Dusk #4E5481 ΔE 0.062
- Muted Purple #805B87 ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.067
- French Blue #436BAD ΔE 0.073
- Dusty Purple #825F87 ΔE 0.073
Use #66549E 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.