#664188
Closest named color: Rebecca Purple (#663399). oklch(45% 0.117 306.3), rgb(102, 65, 136).
Aa
White text reads best on this color (7.84:1).
About this color
#664188 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.117 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.045 away. White text reads best on it, at 7.84:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #664188 |
| RGB | rgb(102, 65, 136) |
| HSL | hsl(271, 35%, 39%) |
| OKLCH | oklch(45% 0.117 306.3) |
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 #664188 | 7.84:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #664188 | 2.67:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #664188 text on white | 7.84:1 | AAA | Lc 87.0 | Fine for body text |
| #664188 text on black | 2.67:1 | Fails | Lc -15.1 | 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 800.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F5
oklch(93.7% 0.02 305.3)
-
Step 200
200
#DFD3EE
oklch(88.5% 0.039 305.6)
-
Step 300
300
#CCB6E4
oklch(81% 0.068 306.6)
-
Step 400
400
#B28ED7
oklch(70.7% 0.111 306.4)
-
Step 500
500
#9F70CC
oklch(63% 0.141 306.3)
-
Step 600
600
#8A57B8
oklch(55.6% 0.152 306.4)
-
Step 700
700
#75469F
oklch(49% 0.143 306.2)
-
Step 800
800 (this color)
#664188
oklch(45% 0.117 306.3)
-
Step 900
900
#4E3367
oklch(37.7% 0.091 306.5)
-
Step 950
950
#2E1E3D
oklch(27% 0.059 306.7)
#664188 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) | #2C508A | 0.090 |
| Deuteranopia (no green cones) | #375286 | 0.082 |
| Tritanopia (no blue cones) | #614D5E | 0.085 |
| Achromatopsia (no color) | #525252 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664188
#664188
oklch(45% 0.117 306.3)
- #456000
#456000
oklch(45.1% 0.115 126.3)
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 #664188, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.045
- Twilight #4E518B ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.056
- Blueberry #464196 ΔE 0.061
- Dusk #4E5481 ΔE 0.065
- Light Eggplant #894585 ΔE 0.069
- Dusty Grape #545775 ΔE 0.079
- Dusky Blue #475F94 ΔE 0.088
Use #664188 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.