#664798
Closest named color: Rebecca Purple (#663399). oklch(47.1% 0.128 299.1), rgb(102, 71, 152).
Aa
White text reads best on this color (7.19:1).
About this color
#664798 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.128 and its hue 299°. 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 7.19:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.91:1 |
| White text | 7.19:1 |
Values
| HEX | #664798 |
| RGB | rgb(102, 71, 152) |
| HSL | hsl(263, 36%, 44%) |
| OKLCH | oklch(47.1% 0.128 299.1) |
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 #664798 | 7.19:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #664798 | 2.91:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #664798 text on white | 7.19:1 | AAA | Lc 84.7 | Fine for body text |
| #664798 text on black | 2.91:1 | Fails | Lc -17.3 | 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
#EBE7F5
oklch(93.5% 0.019 299.1)
-
Step 200
200
#DCD5ED
oklch(88.6% 0.033 299)
-
Step 300
300
#C6B8E4
oklch(80.9% 0.063 299.5)
-
Step 400
400
#A993D6
oklch(70.8% 0.099 298.9)
-
Step 500
500
#9577CB
oklch(63.2% 0.126 299.2)
-
Step 600
600
#7F5EB8
oklch(55.6% 0.138 298.8)
-
Step 700
700 (this color)
#664798
oklch(47.1% 0.128 299.1)
-
Step 800
800
#583F80
oklch(42.6% 0.107 299.6)
-
Step 900
900
#483667
oklch(37.6% 0.083 299.3)
-
Step 950
950
#2A203C
oklch(26.9% 0.052 299.3)
#664798 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) | #29579B | 0.088 |
| Deuteranopia (no green cones) | #325796 | 0.082 |
| Tritanopia (no blue cones) | #5C5768 | 0.101 |
| Achromatopsia (no color) | #575757 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664798
#664798
oklch(47.1% 0.128 299.1)
- #556300
#556300
oklch(47.1% 0.111 118.9)
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 #664798, 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 0.052
- Blueberry #464196 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.063
- Dusk #4E5481 ΔE 0.067
- Light Eggplant #894585 ΔE 0.072
- Iris #6258C4 ΔE 0.077
- Dusky Blue #475F94 ΔE 0.077
Use #664798 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.