#664C95
Closest named color: Twilight (#4E518B). oklch(47.8% 0.116 298.3), rgb(102, 76, 149).
Aa
White text reads best on this color (6.92:1).
About this color
#664C95 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.116 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.044 away. White text reads best on it, at 6.92:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #664C95 |
| RGB | rgb(102, 76, 149) |
| HSL | hsl(261, 32%, 44%) |
| OKLCH | oklch(47.8% 0.116 298.3) |
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 #664C95 | 6.92:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #664C95 | 3.03:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #664C95 text on white | 6.92:1 | AA | Lc 83.8 | Fine for body text |
| #664C95 text on black | 3.03:1 | AA large text | Lc -18.2 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C5B9E1
oklch(80.9% 0.057 298.8)
-
Step 400
400
#A794D2
oklch(70.6% 0.091 298.1)
-
Step 500
500
#9279C6
oklch(63.1% 0.116 298)
-
Step 600
600
#7D61B2
oklch(55.6% 0.125 298.2)
-
Step 700
700 (this color)
#664C95
oklch(47.8% 0.116 298.3)
-
Step 800
800
#56427C
oklch(42.7% 0.095 298.2)
-
Step 900
900
#473864
oklch(37.7% 0.075 298.5)
-
Step 950
950
#29213A
oklch(26.9% 0.047 297.9)
#664C95 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) | #345A98 | 0.075 |
| Deuteranopia (no green cones) | #3A5993 | 0.070 |
| Tritanopia (no blue cones) | #5C5A69 | 0.092 |
| Achromatopsia (no color) | #5A5A5A | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664C95
#664C95
oklch(47.8% 0.116 298.3)
- #586500
#586500
oklch(47.9% 0.112 118.1)
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 #664C95, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.044
- Dusk #4E5481 ΔE 0.057
- Rebecca Purple #663399 ΔE 0.059
- Blueberry #464196 ΔE 0.064
- Dusky Blue #475F94 ΔE 0.066
- Light Eggplant #894585 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.069
- Muted Purple #805B87 ΔE 0.071
Use #664C95 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.