#664F87
Closest named color: Twilight (#4E518B). oklch(47.5% 0.091 302), rgb(102, 79, 135).
Aa
White text reads best on this color (6.92:1).
About this color
#664F87 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.091 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.039 away. White text reads best on it, at 6.92:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #664F87 |
| RGB | rgb(102, 79, 135) |
| HSL | hsl(265, 26%, 42%) |
| OKLCH | oklch(47.5% 0.091 302) |
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 #664F87 | 6.92:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #664F87 | 3.03:1 | AA large text | Lc 20.2 | Dividers and decoration only |
| #664F87 text on white | 6.92:1 | AA | Lc 83.9 | Fine for body text |
| #664F87 text on black | 3.03:1 | AA large text | Lc -18.1 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#EBE8F1
oklch(93.6% 0.012 301.3)
-
Step 200
200
#DCD6E7
oklch(88.6% 0.024 301.9)
-
Step 300
300
#C6BAD9
oklch(80.9% 0.045 303)
-
Step 400
400
#A897C6
oklch(70.8% 0.07 301.2)
-
Step 500
500
#937CB7
oklch(63% 0.09 301.8)
-
Step 600
600
#7E65A3
oklch(55.6% 0.097 301.9)
-
Step 700
700 (this color)
#664F87
oklch(47.5% 0.091 302)
-
Step 800
800
#574471
oklch(42.6% 0.076 302.7)
-
Step 900
900
#473A5C
oklch(37.7% 0.059 301.2)
-
Step 950
950
#2A2236
oklch(27% 0.038 302.3)
#664F87 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) | #415989 | 0.059 |
| Deuteranopia (no green cones) | #465A86 | 0.055 |
| Tritanopia (no blue cones) | #605864 | 0.071 |
| Achromatopsia (no color) | #5A5A5A | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664F87
#664F87
oklch(47.5% 0.091 302)
- #546424
#546424
oklch(47.5% 0.091 121.8)
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 #664F87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.039
- Dusk #4E5481 ΔE 0.042
- Dusty Grape #545775 ΔE 0.051
- Muted Purple #805B87 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.060
- Light Eggplant #894585 ΔE 0.066
- Dull Purple #84597E ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.067
Use #664F87 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.