#664DCA
Closest named color: Bluey Purple (#6241C7). oklch(51.6% 0.185 287.2), rgb(102, 77, 202).
Aa
White text reads best on this color (6.03:1).
About this color
#664DCA is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.185 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.027 away. White text reads best on it, at 6.03:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.47:1 |
| White text | 6.03:1 |
Values
| HEX | #664DCA |
| RGB | rgb(102, 77, 202) |
| HSL | hsl(252, 54%, 55%) |
| OKLCH | oklch(51.6% 0.185 287.2) |
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 #664DCA | 6.03:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #664DCA | 3.47:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #664DCA text on white | 6.03:1 | AA | Lc 79.7 | Fine for body text |
| #664DCA text on black | 3.47:1 | AA large text | Lc -22.1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D6D5F9
oklch(88.5% 0.049 286.6)
-
Step 300
300
#BCB8F8
oklch(80.8% 0.09 287.1)
-
Step 400
400
#9C91F4
oklch(70.7% 0.142 287.3)
-
Step 500
500
#8672F0
oklch(63.2% 0.182 287.3)
-
Step 600
600
#7156DF
oklch(55.6% 0.199 287.1)
-
Step 700
700 (this color)
#664DCA
oklch(51.6% 0.185 287.2)
-
Step 800
800
#4D3A9C
oklch(42.7% 0.152 287)
-
Step 900
900
#40337C
oklch(37.7% 0.119 287.5)
-
Step 950
950
#251F49
oklch(27.1% 0.075 286.8)
#664DCA 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) | #0066CE | 0.098 |
| Deuteranopia (no green cones) | #005FC7 | 0.096 |
| Tritanopia (no blue cones) | #436B84 | 0.154 |
| Achromatopsia (no color) | #636363 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664DCA
#664DCA
oklch(51.6% 0.185 287.2)
- #6F6C00
#6F6C00
oklch(51.7% 0.111 107.8)
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 #664DCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.027
- Iris #6258C4 ΔE 0.027
- Slate Blue #6A5ACD ΔE 0.031
- Light Indigo #6D5ACF ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.042
- Warm Blue #4B57DB ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Blurple #5539CC ΔE 0.052
Use #664DCA 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.