#666FBD#666FBD

#666FBD is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.0% C 0.120 H 276.9°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#666FBD
RGB	rgb(102, 111, 189)
HSL	hsl(234, 40%, 57%)
HSV	hsv(234, 46%, 74%)
CMYK	cmyk(46%, 41.3%, 0%, 25.9%)
CIE-LAB	lab(49.33, 17.49, -42.18)
CIE-LCH	lch(49.33, 45.66, 292.52°)
OKLab	oklab(56.98% 0.0144 -0.1192)
OKLCH	oklch(56.98% 0.12 276.9)
XYZ	xyz(20.3464, 17.8667, 50.5108)
Luminance	0.1787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FBD #BDB466

analogous

#669BBD #666FBD #8966BD

triadic

#666FBD #BD666F #6FBD66

tetradic

#666FBD #BD669B #BDB466 #66BD89

square

#666FBD #BD669B #BDB466 #66BD89

split-complementary

#666FBD #BD8966 #9BBD66

monochromatic

#333A76 #454FA1 #666FBD #9197CF #BCBFE2

Accessibility & contrast

On white

4.59

#666FBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#666FBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666FBD

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FBD	#FFFFFF	#000000	##FFFFFF
##666FBD	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5179C0

Deuteranopia (green-blind)

#4B72BB

Tritanopia (blue-blind)

#477F8D

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666fbd;
/* rgb */ color: rgb(102, 111, 189);
/* oklch */ color: oklch(57.0% 0.120 276.9);

Tailwind

colors: {
  custom: {
    50: '#9698d1',
    500: '#666fbd',
    950: '#000000',
  },
}

SCSS

$custom: #666fbd;
$custom-light: #9698d1;
$custom-dark: #000000;

JSON

{
  "hex": "#666fbd",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 189
  },
  "hsl": {
    "h": 233.793,
    "s": 39.726,
    "l": 57.059
  },
  "oklch": {
    "l": 0.56982,
    "c": 0.12006,
    "h": 276.9
  },
  "luminance": 0.17868
}

Semantic roles & 50–950 ramp

primary

#666FBD

secondary

#D1CDAE

accent

#C358D0

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666FBD

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

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