#666ED0#666ED0

#666ED0 is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.9% C 0.149 H 277.2°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#666ED0
RGB	rgb(102, 110, 208)
HSL	hsl(235, 53%, 61%)
HSV	hsv(235, 51%, 82%)
CMYK	cmyk(51%, 47.1%, 0%, 18.4%)
CIE-LAB	lab(50.13, 23.96, -51.80)
CIE-LCH	lch(50.13, 57.07, 294.83°)
OKLab	oklab(57.93% 0.0186 -0.1474)
OKLCH	oklch(57.93% 0.149 277.2)
XYZ	xyz(22.4370, 18.5294, 62.0565)
Luminance	0.1853 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666ED0 #D0C866

analogous

#66A3D0 #666ED0 #9366D0

triadic

#666ED0 #D0666E #6ED066

tetradic

#666ED0 #D066A3 #D0C866 #66D093

square

#666ED0 #D066A3 #D0C866 #66D093

split-complementary

#666ED0 #D09366 #A3D066

monochromatic

#2C3490 #3A44BE #666ED0 #959ADE #C4C7ED

Accessibility & contrast

On white

4.46

#666ED0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#666ED0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666ED0

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666ED0	#FFFFFF	#000000	##000000
##666ED0	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#427CD4

Deuteranopia (green-blind)

#3873CE

Tritanopia (blue-blind)

#3A8395

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666ed0;
/* rgb */ color: rgb(102, 110, 208);
/* oklch */ color: oklch(57.9% 0.149 277.2);

Tailwind

colors: {
  custom: {
    50: '#9897df',
    500: '#666ed0',
    950: '#000000',
  },
}

SCSS

$custom: #666ed0;
$custom-light: #9897df;
$custom-dark: #000000;

JSON

{
  "hex": "#666ed0",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 208
  },
  "hsl": {
    "h": 235.472,
    "s": 53,
    "l": 60.784
  },
  "oklch": {
    "l": 0.57933,
    "c": 0.14856,
    "h": 277.2
  },
  "luminance": 0.18531
}

Semantic roles & 50–950 ramp

primary

#666ED0

secondary

#DDDAB5

accent

#B525C0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666ED0

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

Preview Lab → · Contrast checker → · Palette generator →