#664AFF
Closest named color: Purpley Blue (#5F34E7). oklch(55.6% 0.252 281.4), rgb(102, 74, 255).
Aa
White text reads best on this color (5.26:1).
About this color
#664AFF is a medium-dark, vivid purple. In OKLCH its lightness is 56%, its chroma 0.252 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Purpley Blue (#5F34E7), ΔE 0.056 away. White text reads best on it, at 5.26:1.
| Hue family | Purples |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.252) |
| Temperature | cool |
| Nearest name | Purpley Blue (#5F34E7) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #664AFF |
| RGB | rgb(102, 74, 255) |
| HSL | hsl(249, 100%, 65%) |
| OKLCH | oklch(55.6% 0.252 281.4) |
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 #664AFF | 5.26:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #664AFF | 3.98:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #664AFF text on white | 5.26:1 | AA | Lc 75.3 | Fine for body text |
| #664AFF text on black | 3.98:1 | AA large text | Lc -26.4 | 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 600.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D2D5FF
oklch(88.4% 0.058 281.9)
-
Step 300
300
#B5B9FF
oklch(80.8% 0.099 281.4)
-
Step 400
400
#9192FF
oklch(70.7% 0.157 281.2)
-
Step 500
500
#7A71FF
oklch(63.1% 0.204 281.7)
-
Step 600
600 (this color)
#664AFF
oklch(55.6% 0.252 281.4)
-
Step 700
700
#5638DE
oklch(49% 0.234 281.7)
-
Step 800
800
#4531B4
oklch(42.7% 0.195 281.2)
-
Step 900
900
#392E8E
oklch(37.7% 0.152 281.5)
-
Step 950
950
#211C53
oklch(26.9% 0.096 281.9)
#664AFF 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) | #0072FF | 0.101 |
| Deuteranopia (no green cones) | #0065FC | 0.089 |
| Tritanopia (no blue cones) | #007CA0 | 0.210 |
| Achromatopsia (no color) | #6C6C6C | 0.253 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664AFF
#664AFF
oklch(55.6% 0.252 281.4)
- #827500
#827500
oklch(55.7% 0.116 101.7)
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 #664AFF, closest first.
No curated palette has a color within ΔE 0.04 of #664AFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purpley Blue #5F34E7 ΔE 0.056
- Burple #6832E3 ΔE 0.060
- Neon Blue #4361EE ΔE 0.063
- Warm Blue #4B57DB ΔE 0.068
- Purply Blue #661AEE ΔE 0.070
- Purpley #8756E4 ΔE 0.075
- Medium Slate Blue #7B68EE ΔE 0.077
- Light Indigo #6D5ACF ΔE 0.081
Use #664AFF 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.