#4C66CB#4C66CB

#4C66CB is a mid, vivid blue. Relative luminance 0.154; OKLCH L 54.4% C 0.159 H 269.6°. Best body text is #FFFFFF at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#4C66CB
RGB	rgb(76, 102, 203)
HSL	hsl(228, 55%, 55%)
HSV	hsv(228, 63%, 80%)
CMYK	cmyk(62.6%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(46.11, 22.09, -55.48)
CIE-LCH	lch(46.11, 59.72, 291.71°)
OKLab	oklab(54.36% -0.0011 -0.1589)
OKLCH	oklch(54.36% 0.159 269.6)
XYZ	xyz(18.5077, 15.3494, 58.4757)
Luminance	0.1535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C66CB #CBB14C

analogous

#4CA5CB #4C66CB #724CCB

triadic

#4C66CB #CB4C66 #66CB4C

tetradic

#4C66CB #CB4CA5 #CBB14C #4CCB72

square

#4C66CB #CB4CA5 #CBB14C #4CCB72

split-complementary

#4C66CB #CB724C #A5CB4C

monochromatic

#233579 #314AA9 #4C66CB #7B8FD9 #ABB7E7

Accessibility & contrast

On white

5.16

#4C66CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.07

#4C66CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4C66CB

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C66CB	#FFFFFF	#000000	##FFFFFF
##4C66CB	1.00	5.16	4.07	5.16
#FFFFFF	5.16	1.00	21.00	1.00
#000000	4.07	21.00	1.00	21.00
##FFFFFF	5.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F73CF

Deuteranopia (green-blind)

#0F68C9

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #4c66cb;
/* rgb */ color: rgb(76, 102, 203);
/* oklch */ color: oklch(54.4% 0.159 269.6);

Tailwind

colors: {
  custom: {
    50: '#8a91db',
    500: '#4c66cb',
    950: '#000000',
  },
}

SCSS

$custom: #4c66cb;
$custom-light: #8a91db;
$custom-dark: #000000;

JSON

{
  "hex": "#4c66cb",
  "rgb": {
    "r": 76,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 227.717,
    "s": 54.978,
    "l": 54.706
  },
  "oklch": {
    "l": 0.54359,
    "c": 0.1589,
    "h": 269.6
  },
  "luminance": 0.15351
}

Semantic roles & 50–950 ramp

primary

#4C66CB

secondary

#D4C99F

accent

#C049DE

background

#F9F8FD

surface

#F1F0FB

border

#CBCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #4C66CB

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

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