#666FAF#666FAF

#666FAF is a mid, moderate blue. Relative luminance 0.173; OKLCH L 56.2% C 0.100 H 276.6°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#666FAF
RGB	rgb(102, 111, 175)
HSL	hsl(233, 31%, 54%)
HSV	hsv(233, 42%, 69%)
CMYK	cmyk(41.7%, 36.6%, 0%, 31.4%)
CIE-LAB	lab(48.62, 13.30, -35.19)
CIE-LCH	lch(48.62, 37.62, 290.70°)
OKLab	oklab(56.2% 0.0115 -0.0988)
OKLCH	oklch(56.2% 0.1 276.6)
XYZ	xyz(18.8995, 17.2879, 42.8902)
Luminance	0.1729 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FAF #AFA666

analogous

#6694AF #666FAF #8266AF

triadic

#666FAF #AF666F #6FAF66

tetradic

#666FAF #AF6694 #AFA666 #66AF82

square

#666FAF #AF6694 #AFA666 #66AF82

split-complementary

#666FAF #AF8266 #94AF66

monochromatic

#353B66 #4A528E #666FAF #8E95C4 #B6BBD9

Accessibility & contrast

On white

4.71

#666FAF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#666FAF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666FAF

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

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

Color blindness preview

Protanopia (red-blind)

#5976B2

Deuteranopia (green-blind)

#5471AE

Tritanopia (blue-blind)

#4F7C87

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666faf;
/* rgb */ color: rgb(102, 111, 175);
/* oklch */ color: oklch(56.2% 0.100 276.6);

Tailwind

colors: {
  custom: {
    50: '#9598c7',
    500: '#666faf',
    950: '#000000',
  },
}

SCSS

$custom: #666faf;
$custom-light: #9598c7;
$custom-dark: #000000;

JSON

{
  "hex": "#666faf",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 175
  },
  "hsl": {
    "h": 232.603,
    "s": 31.33,
    "l": 54.314
  },
  "oklch": {
    "l": 0.56202,
    "c": 0.0995,
    "h": 276.6
  },
  "luminance": 0.17289
}

Semantic roles & 50–950 ramp

primary

#666FAF

secondary

#C8C4A9

accent

#BB60C8

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666FAF

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

Preview Lab → · Contrast checker → · Palette generator →