#666EA7#666EA7

#666EA7 is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.6% C 0.089 H 277.0°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#666EA7
RGB	rgb(102, 110, 167)
HSL	hsl(233, 27%, 53%)
HSV	hsv(233, 39%, 65%)
CMYK	cmyk(38.9%, 34.1%, 0%, 34.5%)
CIE-LAB	lab(47.96, 11.58, -31.56)
CIE-LCH	lch(47.96, 33.61, 290.15°)
OKLab	oklab(55.57% 0.0108 -0.0883)
OKLCH	oklch(55.57% 0.089 277)
XYZ	xyz(18.0284, 16.7659, 38.8380)
Luminance	0.1677 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EA7 #A79F66

analogous

#668FA7 #666EA7 #7E66A7

triadic

#666EA7 #A7666E #6EA766

tetradic

#666EA7 #A7668F #A79F66 #66A77E

square

#666EA7 #A7668F #A79F66 #66A77E

split-complementary

#666EA7 #A77E66 #8FA766

monochromatic

#363A5D #4C5384 #666EA7 #8D93BD #B4B8D4

Accessibility & contrast

On white

4.82

#666EA7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#666EA7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666EA7

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EA7	#FFFFFF	#000000	##FFFFFF
##666EA7	1.00	4.82	4.35	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B74A9

Deuteranopia (green-blind)

#576FA6

Tritanopia (blue-blind)

#537983

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666ea7;
/* rgb */ color: rgb(102, 110, 167);
/* oklch */ color: oklch(55.6% 0.089 277.0);

Tailwind

colors: {
  custom: {
    50: '#9497c1',
    500: '#666ea7',
    950: '#000000',
  },
}

SCSS

$custom: #666ea7;
$custom-light: #9497c1;
$custom-dark: #000000;

JSON

{
  "hex": "#666ea7",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 167
  },
  "hsl": {
    "h": 232.615,
    "s": 26.971,
    "l": 52.745
  },
  "oklch": {
    "l": 0.5557,
    "c": 0.08896,
    "h": 277
  },
  "luminance": 0.16767
}

Semantic roles & 50–950 ramp

primary

#666EA7

secondary

#C2BFA6

accent

#B864C3

background

#F9F9FB

surface

#F2F2F7

border

#CCCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666EA7

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

Preview Lab → · Contrast checker → · Palette generator →