#4F57CC#4F57CC

#4F57CC is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.7% C 0.179 H 275.3°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#4F57CC
RGB	rgb(79, 87, 204)
HSL	hsl(236, 55%, 55%)
HSV	hsv(236, 61%, 80%)
CMYK	cmyk(61.3%, 57.4%, 0%, 20%)
CIE-LAB	lab(42.52, 32.37, -61.86)
CIE-LCH	lch(42.52, 69.82, 297.63°)
OKLab	oklab(51.73% 0.0165 -0.1777)
OKLCH	oklch(51.73% 0.179 275.3)
XYZ	xyz(17.5282, 12.8369, 58.6691)
Luminance	0.1284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4F57CC #CCC44F

analogous

#4F95CC #4F57CC #854FCC

triadic

#4F57CC #CC4F57 #57CC4F

tetradic

#4F57CC #CC4F95 #CCC44F #4FCC85

square

#4F57CC #CC4F95 #CCC44F #4FCC85

split-complementary

#4F57CC #CC854F #95CC4F

monochromatic

#242A7D #323AAC #4F57CC #7E84DA #AEB2E7

Accessibility & contrast

On white

5.89

#4F57CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#4F57CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4F57CC

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4F57CC	#FFFFFF	#000000	##FFFFFF
##4F57CC	1.00	5.89	3.57	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD0

Deuteranopia (green-blind)

#005FCA

Tritanopia (blue-blind)

#007389

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4f57cc;
/* rgb */ color: rgb(79, 87, 204);
/* oklch */ color: oklch(51.7% 0.179 275.3);

Tailwind

colors: {
  custom: {
    50: '#8c86dc',
    500: '#4f57cc',
    950: '#000000',
  },
}

SCSS

$custom: #4f57cc;
$custom-light: #8c86dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4f57cc",
  "rgb": {
    "r": 79,
    "g": 87,
    "b": 204
  },
  "hsl": {
    "h": 236.16,
    "s": 55.066,
    "l": 55.49
  },
  "oklch": {
    "l": 0.5173,
    "c": 0.17851,
    "h": 275.3
  },
  "luminance": 0.12838
}

Semantic roles & 50–950 ramp

primary

#4F57CC

secondary

#D5D2A1

accent

#D549DE

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #4F57CC

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

Preview Lab → · Contrast checker → · Palette generator →