#666BE5#666BE5

#666BE5 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.8% C 0.181 H 277.5°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#666BE5
RGB	rgb(102, 107, 229)
HSL	hsl(238, 71%, 65%)
HSV	hsv(238, 55%, 90%)
CMYK	cmyk(55.5%, 53.3%, 0%, 10.2%)
CIE-LAB	lab(50.68, 32.40, -62.81)
CIE-LCH	lch(50.68, 70.67, 297.29°)
OKLab	oklab(58.77% 0.0236 -0.1798)
OKLCH	oklch(58.77% 0.181 277.5)
XYZ	xyz(24.8755, 18.9956, 76.4693)
Luminance	0.1900 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BE5 #E5E066

analogous

#66AAE5 #666BE5 #A166E5

triadic

#666BE5 #E5666B #6BE566

tetradic

#666BE5 #E566AA #E5E066 #66E5A1

square

#666BE5 #E566AA #E5E066 #66E5A1

split-complementary

#666BE5 #E5A166 #AAE566

monochromatic

#1E24B2 #3238DC #666BE5 #9A9EEE #CFD0F7

Accessibility & contrast

On white

4.38

#666BE5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#666BE5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BE5

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BE5	#FFFFFF	#000000	##000000
##666BE5	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#207EE9

Deuteranopia (green-blind)

#0074E2

Tritanopia (blue-blind)

#21879E

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666be5;
/* rgb */ color: rgb(102, 107, 229);
/* oklch */ color: oklch(58.8% 0.181 277.5);

Tailwind

colors: {
  custom: {
    50: '#9b95ee',
    500: '#666be5',
    950: '#000000',
  },
}

SCSS

$custom: #666be5;
$custom-light: #9b95ee;
$custom-dark: #000000;

JSON

{
  "hex": "#666be5",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 229
  },
  "hsl": {
    "h": 237.638,
    "s": 70.95,
    "l": 64.902
  },
  "oklch": {
    "l": 0.58765,
    "c": 0.18131,
    "h": 277.5
  },
  "luminance": 0.18997
}

Semantic roles & 50–950 ramp

primary

#666BE5

secondary

#E9E7BE

accent

#CB13D3

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666BE5

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

Preview Lab → · Contrast checker → · Palette generator →