#666BE0#666BE0

#666BE0 is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.4% C 0.175 H 277.7°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#666BE0
RGB	rgb(102, 107, 224)
HSL	hsl(238, 66%, 64%)
HSV	hsv(238, 54%, 88%)
CMYK	cmyk(54.5%, 52.2%, 0%, 12.2%)
CIE-LAB	lab(50.36, 30.82, -60.51)
CIE-LCH	lch(50.36, 67.91, 296.99°)
OKLab	oklab(58.42% 0.0233 -0.173)
OKLCH	oklch(58.42% 0.175 277.7)
XYZ	xyz(24.1875, 18.7204, 72.8454)
Luminance	0.1872 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BE0 #E0DB66

analogous

#66A8E0 #666BE0 #9E66E0

triadic

#666BE0 #E0666B #6BE066

tetradic

#666BE0 #E066A8 #E0DB66 #66E09E

square

#666BE0 #E066A8 #E0DB66 #66E09E

split-complementary

#666BE0 #E09E66 #A8E066

monochromatic

#2228A9 #333AD6 #666BE0 #999CEA #CCCDF5

Accessibility & contrast

On white

4.43

#666BE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#666BE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BE0

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BE0	#FFFFFF	#000000	##000000
##666BE0	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#297DE4

Deuteranopia (green-blind)

#1173DE

Tritanopia (blue-blind)

#29859B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666be0;
/* rgb */ color: rgb(102, 107, 224);
/* oklch */ color: oklch(58.4% 0.175 277.7);

Tailwind

colors: {
  custom: {
    50: '#9b95ea',
    500: '#666be0',
    950: '#000000',
  },
}

SCSS

$custom: #666be0;
$custom-light: #9b95ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666be0",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 224
  },
  "hsl": {
    "h": 237.541,
    "s": 66.304,
    "l": 63.922
  },
  "oklch": {
    "l": 0.58419,
    "c": 0.17459,
    "h": 277.7
  },
  "luminance": 0.18722
}

Semantic roles & 50–950 ramp

primary

#666BE0

secondary

#E6E5BC

accent

#C717CE

background

#FAF9FE

surface

#F3F1FD

border

#CDCBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666BE0

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

Preview Lab → · Contrast checker → · Palette generator →