#4C57CB#4C57CB

#4C57CB is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.5% C 0.178 H 274.2°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#4C57CB
RGB	rgb(76, 87, 203)
HSL	hsl(235, 55%, 55%)
HSV	hsv(235, 63%, 80%)
CMYK	cmyk(62.6%, 57.1%, 0%, 20.4%)
CIE-LAB	lab(42.25, 31.54, -61.72)
CIE-LCH	lch(42.25, 69.31, 297.06°)
OKLab	oklab(51.46% 0.0131 -0.1774)
OKLCH	oklch(51.46% 0.178 274.2)
XYZ	xyz(17.1646, 12.6633, 58.0280)
Luminance	0.1267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4C57CB #CBC04C

analogous

#4C97CB #4C57CB #814CCB

triadic

#4C57CB #CB4C57 #57CB4C

tetradic

#4C57CB #CB4C97 #CBC04C #4CCB81

square

#4C57CB #CB4C97 #CBC04C #4CCB81

split-complementary

#4C57CB #CB814C #97CB4C

monochromatic

#232B79 #313BA9 #4C57CB #7B84D9 #ABB0E7

Accessibility & contrast

On white

5.94

#4C57CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#4C57CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4C57CB

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4C57CB	#FFFFFF	#000000	##FFFFFF
##4C57CB	1.00	5.94	3.53	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069CF

Deuteranopia (green-blind)

#005EC9

Tritanopia (blue-blind)

#007388

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4c57cb;
/* rgb */ color: rgb(76, 87, 203);
/* oklch */ color: oklch(51.5% 0.178 274.2);

Tailwind

colors: {
  custom: {
    50: '#8b86dc',
    500: '#4c57cb',
    950: '#000000',
  },
}

SCSS

$custom: #4c57cb;
$custom-light: #8b86dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4c57cb",
  "rgb": {
    "r": 76,
    "g": 87,
    "b": 203
  },
  "hsl": {
    "h": 234.803,
    "s": 54.978,
    "l": 54.706
  },
  "oklch": {
    "l": 0.5146,
    "c": 0.1779,
    "h": 274.2
  },
  "luminance": 0.12665
}

Semantic roles & 50–950 ramp

primary

#4C57CB

secondary

#D4D09F

accent

#D149DE

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #4C57CB

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

Preview Lab → · Contrast checker → · Palette generator →