#4B57CB#4B57CB

#4B57CB is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.4% C 0.178 H 273.9°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#4B57CB
RGB	rgb(75, 87, 203)
HSL	hsl(234, 55%, 55%)
HSV	hsv(234, 63%, 80%)
CMYK	cmyk(63.1%, 57.1%, 0%, 20.4%)
CIE-LAB	lab(42.19, 31.37, -61.82)
CIE-LCH	lch(42.19, 69.33, 296.91°)
OKLab	oklab(51.4% 0.012 -0.1777)
OKLCH	oklch(51.4% 0.178 273.9)
XYZ	xyz(17.0858, 12.6226, 58.0244)
Luminance	0.1262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B57CB #CBBF4B

analogous

#4B97CB #4B57CB #7F4BCB

triadic

#4B57CB #CB4B57 #57CB4B

tetradic

#4B57CB #CB4B97 #CBBF4B #4BCB7F

square

#4B57CB #CB4B97 #CBBF4B #4BCB7F

split-complementary

#4B57CB #CB7F4B #97CB4B

monochromatic

#232B79 #313CA8 #4B57CB #7A83D9 #AAB0E6

Accessibility & contrast

On white

5.96

#4B57CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#4B57CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B57CB

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B57CB	#FFFFFF	#000000	##FFFFFF
##4B57CB	1.00	5.96	3.52	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.96	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: #4b57cb;
/* rgb */ color: rgb(75, 87, 203);
/* oklch */ color: oklch(51.4% 0.178 273.9);

Tailwind

colors: {
  custom: {
    50: '#8a86dc',
    500: '#4b57cb',
    950: '#000000',
  },
}

SCSS

$custom: #4b57cb;
$custom-light: #8a86dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4b57cb",
  "rgb": {
    "r": 75,
    "g": 87,
    "b": 203
  },
  "hsl": {
    "h": 234.375,
    "s": 55.172,
    "l": 54.51
  },
  "oklch": {
    "l": 0.51397,
    "c": 0.17815,
    "h": 273.9
  },
  "luminance": 0.12624
}

Semantic roles & 50–950 ramp

primary

#4B57CB

secondary

#D4CF9E

accent

#D149DF

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #4B57CB

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

Preview Lab → · Contrast checker → · Palette generator →