#664EC7
Closest named color: Iris (#6258C4). oklch(51.6% 0.18 287.5), rgb(102, 78, 199).
Aa
White text reads best on this color (6.03:1).
About this color
#664EC7 is a medium-dark, vivid purple. In OKLCH its lightness is 52%, its chroma 0.180 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.024 away. White text reads best on it, at 6.03:1.
| Hue family | Purples |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.47:1 |
| White text | 6.03:1 |
Values
| HEX | #664EC7 |
| RGB | rgb(102, 78, 199) |
| HSL | hsl(252, 52%, 54%) |
| OKLCH | oklch(51.6% 0.18 287.5) |
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 #664EC7 | 6.03:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #664EC7 | 3.47:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #664EC7 text on white | 6.03:1 | AA | Lc 79.7 | Fine for body text |
| #664EC7 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
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F8
oklch(88.5% 0.048 286.7)
-
Step 300
300
#BDB8F6
oklch(80.8% 0.087 288)
-
Step 400
400
#9C91F2
oklch(70.6% 0.139 287.5)
-
Step 500
500
#8673ED
oklch(63.2% 0.177 287.4)
-
Step 600
600
#7157DC
oklch(55.5% 0.194 287.3)
-
Step 700
700 (this color)
#664EC7
oklch(51.6% 0.18 287.5)
-
Step 800
800
#4E3B9A
oklch(42.8% 0.148 287.6)
-
Step 900
900
#40347B
oklch(37.8% 0.116 287.3)
-
Step 950
950
#251F48
oklch(27% 0.074 287.1)
#664EC7 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) | #0066CB | 0.098 |
| Deuteranopia (no green cones) | #005FC4 | 0.096 |
| Tritanopia (no blue cones) | #456A83 | 0.148 |
| Achromatopsia (no color) | #636363 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664EC7
#664EC7
oklch(51.6% 0.18 287.5)
- #6F6B00
#6F6B00
oklch(51.5% 0.11 107.1)
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 #664EC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.024
- Bluey Purple #6241C7 ΔE 0.029
- Slate Blue #6A5ACD ΔE 0.030
- Light Indigo #6D5ACF ΔE 0.033
- Dark Periwinkle #665FD1 ΔE 0.041
- Warm Blue #4B57DB ΔE 0.051
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Blurple #5539CC ΔE 0.055
Use #664EC7 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.