#664584
Closest named color: Twilight (#4E518B). oklch(45.5% 0.105 306.9), rgb(102, 69, 132).
Aa
White text reads best on this color (7.63:1).
About this color
#664584 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 46%, its chroma 0.105 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.048 away. White text reads best on it, at 7.63:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.74:1 |
| White text | 7.63:1 |
Values
| HEX | #664584 |
| RGB | rgb(102, 69, 132) |
| HSL | hsl(271, 31%, 39%) |
| OKLCH | oklch(45.5% 0.105 306.9) |
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 #664584 | 7.63:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #664584 | 2.74:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #664584 text on white | 7.63:1 | AAA | Lc 86.4 | Fine for body text |
| #664584 text on black | 2.74:1 | Fails | Lc -15.7 | 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
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EB
oklch(88.6% 0.033 307.1)
-
Step 300
300
#CBB7E0
oklch(81% 0.061 307.1)
-
Step 400
400
#B190D1
oklch(70.7% 0.099 307.2)
-
Step 500
500
#9D74C5
oklch(63.2% 0.125 306.4)
-
Step 600
600
#885BB1
oklch(55.6% 0.136 306.7)
-
Step 700
700
#744A98
oklch(49.1% 0.127 307.2)
-
Step 800
800 (this color)
#664584
oklch(45.5% 0.105 306.9)
-
Step 900
900
#4D3563
oklch(37.7% 0.081 307)
-
Step 950
950
#2D1F3A
oklch(27% 0.052 307.1)
#664584 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) | #355286 | 0.079 |
| Deuteranopia (no green cones) | #3E5482 | 0.072 |
| Tritanopia (no blue cones) | #624F5E | 0.076 |
| Achromatopsia (no color) | #535353 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664584
#664584
oklch(45.5% 0.105 306.9)
- #476115
#476115
oklch(45.6% 0.105 126.9)
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 #664584, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.048
- Dusk #4E5481 ΔE 0.055
- Rebecca Purple #663399 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Blueberry #464196 ΔE 0.066
- Light Eggplant #894585 ΔE 0.066
- Dusty Grape #545775 ΔE 0.067
- Muted Purple #805B87 ΔE 0.079
Use #664584 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.