#664EF0#664EF0

#664EF0 is a mid, highly saturated blue. Relative luminance 0.146; OKLCH L 54.9% C 0.231 H 282.4°. Best body text is #FFFFFF at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#664EF0
RGB	rgb(102, 78, 240)
HSL	hsl(249, 84%, 62%)
HSV	hsv(249, 68%, 94%)
CMYK	cmyk(57.5%, 67.5%, 0%, 5.9%)
CIE-LAB	lab(45.03, 52.65, -78.18)
CIE-LCH	lch(45.03, 94.26, 303.96°)
OKLab	oklab(54.87% 0.0497 -0.2251)
OKLCH	oklch(54.87% 0.231 282.4)
XYZ	xyz(23.9272, 14.5633, 83.9713)
Luminance	0.1457 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#664EF0 #D8F04E

analogous

#4E87F0 #664EF0 #B74EF0

triadic

#664EF0 #F0664E #4EF066

tetradic

#664EF0 #F04E87 #D8F04E #4EF0B7

square

#664EF0 #F04E87 #D8F04E #4EF0B7

split-complementary

#664EF0 #F0B74E #87F04E

monochromatic

#280FB4 #3516EB #664EF0 #9786F5 #C8BFFA

Accessibility & contrast

On white

5.37

#664EF0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.91

#664EF0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #664EF0

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##664EF0	#FFFFFF	#000000	##FFFFFF
##664EF0	1.00	5.37	3.91	5.37
#FFFFFF	5.37	1.00	21.00	1.00
#000000	3.91	21.00	1.00	21.00
##FFFFFF	5.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0070F5

Deuteranopia (green-blind)

#0065ED

Tritanopia (blue-blind)

#107899

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #664ef0;
/* rgb */ color: rgb(102, 78, 240);
/* oklch */ color: oklch(54.9% 0.231 282.4);

Tailwind

colors: {
  custom: {
    50: '#9f82f6',
    500: '#664ef0',
    950: '#000000',
  },
}

SCSS

$custom: #664ef0;
$custom-light: #9f82f6;
$custom-dark: #000000;

JSON

{
  "hex": "#664ef0",
  "rgb": {
    "r": 102,
    "g": 78,
    "b": 240
  },
  "hsl": {
    "h": 248.889,
    "s": 84.375,
    "l": 62.353
  },
  "oklch": {
    "l": 0.54871,
    "c": 0.23051,
    "h": 282.4
  },
  "luminance": 0.14565
}

Semantic roles & 50–950 ramp

primary

#664EF0

secondary

#E2EAAF

accent

#E105C0

background

#FAF8FF

surface

#F4EFFF

border

#CECAD7

text

#100A17

muted

#7F7C85

Preview Lab

Preview with #664EF0

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →