#664DA0
Closest named color: Twilight (#4E518B). oklch(48.7% 0.13 295), rgb(102, 77, 160).
Aa
White text reads best on this color (6.70:1).
About this color
#664DA0 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 49%, its chroma 0.130 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.054 away. White text reads best on it, at 6.70:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.13:1 |
| White text | 6.70:1 |
Values
| HEX | #664DA0 |
| RGB | rgb(102, 77, 160) |
| HSL | hsl(258, 35%, 46%) |
| OKLCH | oklch(48.7% 0.13 295) |
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 #664DA0 | 6.70:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #664DA0 | 3.13:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #664DA0 text on white | 6.70:1 | AA | Lc 82.9 | Fine for body text |
| #664DA0 text on black | 3.13:1 | AA large text | Lc -19.1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EE
oklch(88.5% 0.034 294.9)
-
Step 300
300
#C3B9E6
oklch(80.9% 0.064 295.1)
-
Step 400
400
#A594D9
oklch(70.7% 0.101 295)
-
Step 500
500
#9078CE
oklch(63.1% 0.128 295.3)
-
Step 600
600
#7A5FBB
oklch(55.5% 0.14 295)
-
Step 700
700 (this color)
#664DA0
oklch(48.7% 0.13 295)
-
Step 800
800
#544183
oklch(42.8% 0.107 294.7)
-
Step 900
900
#453769
oklch(37.6% 0.084 294.9)
-
Step 950
950
#28213D
oklch(27% 0.052 294.2)
#664DA0 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) | #2D5DA3 | 0.081 |
| Deuteranopia (no green cones) | #335B9E | 0.076 |
| Tritanopia (no blue cones) | #585D6F | 0.103 |
| Achromatopsia (no color) | #5C5C5C | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664DA0
#664DA0
oklch(48.7% 0.13 295)
- #5E6600
#5E6600
oklch(48.7% 0.11 115)
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 #664DA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.054
- Rebecca Purple #663399 ΔE 0.059
- Iris #6258C4 ΔE 0.060
- Blueberry #464196 ΔE 0.066
- Dusk #4E5481 ΔE 0.069
- Dusky Blue #475F94 ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.070
- Slate Blue #6A5ACD ΔE 0.075
Use #664DA0 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.