#666FBE#666FBE

#666FBE is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.0% C 0.122 H 276.9°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#666FBE
RGB	rgb(102, 111, 190)
HSL	hsl(234, 40%, 57%)
HSV	hsv(234, 46%, 75%)
CMYK	cmyk(46.3%, 41.6%, 0%, 25.5%)
CIE-LAB	lab(49.39, 17.79, -42.67)
CIE-LCH	lch(49.39, 46.23, 292.64°)
OKLab	oklab(57.04% 0.0146 -0.1206)
OKLCH	oklch(57.04% 0.122 276.9)
XYZ	xyz(20.4553, 17.9103, 51.0844)
Luminance	0.1791 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FBE #BEB566

analogous

#669BBE #666FBE #8966BE

triadic

#666FBE #BE666F #6FBE66

tetradic

#666FBE #BE669B #BEB566 #66BE89

square

#666FBE #BE669B #BEB566 #66BE89

split-complementary

#666FBE #BE8966 #9BBE66

monochromatic

#333A77 #454EA2 #666FBE #9197D0 #BCC0E2

Accessibility & contrast

On white

4.58

#666FBE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#666FBE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FBE

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FBE	#FFFFFF	#000000	##000000
##666FBE	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5179C1

Deuteranopia (green-blind)

#4A72BC

Tritanopia (blue-blind)

#477F8D

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666fbe;
/* rgb */ color: rgb(102, 111, 190);
/* oklch */ color: oklch(57.0% 0.122 276.9);

Tailwind

colors: {
  custom: {
    50: '#9698d2',
    500: '#666fbe',
    950: '#000000',
  },
}

SCSS

$custom: #666fbe;
$custom-light: #9698d2;
$custom-dark: #000000;

JSON

{
  "hex": "#666fbe",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 190
  },
  "hsl": {
    "h": 233.864,
    "s": 40.367,
    "l": 57.255
  },
  "oklch": {
    "l": 0.5704,
    "c": 0.12151,
    "h": 276.9
  },
  "luminance": 0.17911
}

Semantic roles & 50–950 ramp

primary

#666FBE

secondary

#D2CEAE

accent

#C458D0

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666FBE

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

Preview Lab → · Contrast checker → · Palette generator →