#4F57CF#4F57CF

#4F57CF is a mid, vivid blue. Relative luminance 0.130; OKLCH L 52.0% C 0.183 H 275.2°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#4F57CF
RGB	rgb(79, 87, 207)
HSL	hsl(236, 57%, 56%)
HSV	hsv(236, 62%, 81%)
CMYK	cmyk(61.8%, 58%, 0%, 18.8%)
CIE-LAB	lab(42.74, 33.38, -63.23)
CIE-LCH	lch(42.74, 71.50, 297.83°)
OKLab	oklab(51.96% 0.0165 -0.1818)
OKLCH	oklch(51.96% 0.183 275.2)
XYZ	xyz(17.8914, 12.9822, 60.5824)
Luminance	0.1298 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4F57CF #CFC74F

analogous

#4F97CF #4F57CF #874FCF

triadic

#4F57CF #CF4F57 #57CF4F

tetradic

#4F57CF #CF4F97 #CFC74F #4FCF87

square

#4F57CF #CF4F97 #CFC74F #4FCF87

split-complementary

#4F57CF #CF874F #97CF4F

monochromatic

#232981 #3038B1 #4F57CF #7F85DC #AFB3E9

Accessibility & contrast

On white

5.84

#4F57CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#4F57CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4F57CF

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4F57CF	#FFFFFF	#000000	##FFFFFF
##4F57CF	1.00	5.84	3.60	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BD3

Deuteranopia (green-blind)

#005FCD

Tritanopia (blue-blind)

#00748A

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #4f57cf;
/* rgb */ color: rgb(79, 87, 207);
/* oklch */ color: oklch(52.0% 0.183 275.2);

Tailwind

colors: {
  custom: {
    50: '#8d86de',
    500: '#4f57cf',
    950: '#000000',
  },
}

SCSS

$custom: #4f57cf;
$custom-light: #8d86de;
$custom-dark: #000000;

JSON

{
  "hex": "#4f57cf",
  "rgb": {
    "r": 79,
    "g": 87,
    "b": 207
  },
  "hsl": {
    "h": 236.25,
    "s": 57.143,
    "l": 56.078
  },
  "oklch": {
    "l": 0.51963,
    "c": 0.18252,
    "h": 275.2
  },
  "luminance": 0.12984
}

Semantic roles & 50–950 ramp

primary

#4F57CF

secondary

#D7D4A2

accent

#D747E0

background

#F9F8FD

surface

#F2EFFB

border

#CCCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #4F57CF

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

Preview Lab → · Contrast checker → · Palette generator →