#4B57CF#4B57CF

#4B57CF is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.7% C 0.184 H 273.8°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#4B57CF
RGB	rgb(75, 87, 207)
HSL	hsl(235, 58%, 55%)
HSV	hsv(235, 64%, 81%)
CMYK	cmyk(63.8%, 58%, 0%, 18.8%)
CIE-LAB	lab(42.48, 32.73, -63.65)
CIE-LCH	lch(42.48, 71.57, 297.22°)
OKLab	oklab(51.71% 0.012 -0.1831)
OKLCH	oklch(51.71% 0.184 273.8)
XYZ	xyz(17.5686, 12.8157, 60.5672)
Luminance	0.1282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B57CF #CFC34B

analogous

#4B99CF #4B57CF #814BCF

triadic

#4B57CF #CF4B57 #57CF4B

tetradic

#4B57CF #CF4B99 #CFC34B #4BCF81

square

#4B57CF #CF4B99 #CFC34B #4BCF81

split-complementary

#4B57CF #CF814B #99CF4B

monochromatic

#222A7E #2E3AAE #4B57CF #7B84DC #ACB1E9

Accessibility & contrast

On white

5.89

#4B57CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#4B57CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B57CF

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B57CF	#FFFFFF	#000000	##FFFFFF
##4B57CF	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD3

Deuteranopia (green-blind)

#005FCD

Tritanopia (blue-blind)

#00748A

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4b57cf;
/* rgb */ color: rgb(75, 87, 207);
/* oklch */ color: oklch(51.7% 0.184 273.8);

Tailwind

colors: {
  custom: {
    50: '#8b86df',
    500: '#4b57cf',
    950: '#000000',
  },
}

SCSS

$custom: #4b57cf;
$custom-light: #8b86df;
$custom-dark: #000000;

JSON

{
  "hex": "#4b57cf",
  "rgb": {
    "r": 75,
    "g": 87,
    "b": 207
  },
  "hsl": {
    "h": 234.545,
    "s": 57.895,
    "l": 55.294
  },
  "oklch": {
    "l": 0.5171,
    "c": 0.18351,
    "h": 273.8
  },
  "luminance": 0.12817
}

Semantic roles & 50–950 ramp

primary

#4B57CF

secondary

#D6D19F

accent

#D347E1

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #4B57CF

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

Preview Lab → · Contrast checker → · Palette generator →