#666FCE#666FCE

#666FCE is a mid, vivid blue. Relative luminance 0.186; OKLCH L 58.0% C 0.144 H 276.8°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#666FCE
RGB	rgb(102, 111, 206)
HSL	hsl(235, 51%, 60%)
HSV	hsv(235, 50%, 81%)
CMYK	cmyk(50.5%, 46.1%, 0%, 19.2%)
CIE-LAB	lab(50.27, 22.73, -50.43)
CIE-LCH	lch(50.27, 55.32, 294.26°)
OKLab	oklab(58% 0.0172 -0.1434)
OKLCH	oklch(58% 0.144 276.8)
XYZ	xyz(22.3010, 18.6486, 60.8050)
Luminance	0.1865 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FCE #CEC566

analogous

#66A3CE #666FCE #9166CE

triadic

#666FCE #CE666F #6FCE66

tetradic

#666FCE #CE66A3 #CEC566 #66CE91

square

#666FCE #CE66A3 #CEC566 #66CE91

split-complementary

#666FCE #CE9166 #A3CE66

monochromatic

#2D358D #3C47BB #666FCE #949BDD #C3C6EC

Accessibility & contrast

On white

4.44

#666FCE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#666FCE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FCE

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FCE	#FFFFFF	#000000	##000000
##666FCE	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467CD2

Deuteranopia (green-blind)

#3C74CC

Tritanopia (blue-blind)

#3B8394

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666fce;
/* rgb */ color: rgb(102, 111, 206);
/* oklch */ color: oklch(58.0% 0.144 276.8);

Tailwind

colors: {
  custom: {
    50: '#9898dd',
    500: '#666fce',
    950: '#000000',
  },
}

SCSS

$custom: #666fce;
$custom-light: #9898dd;
$custom-dark: #000000;

JSON

{
  "hex": "#666fce",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 206
  },
  "hsl": {
    "h": 234.808,
    "s": 51.485,
    "l": 60.392
  },
  "oklch": {
    "l": 0.58003,
    "c": 0.14439,
    "h": 276.8
  },
  "luminance": 0.1865
}

Semantic roles & 50–950 ramp

primary

#666FCE

secondary

#DCD8B4

accent

#B227BF

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666FCE

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

Preview Lab → · Contrast checker → · Palette generator →