#4F57DB#4F57DB

#4F57DB is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.9% C 0.198 H 274.7°. Best body text is #FFFFFF at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#4F57DB
RGB	rgb(79, 87, 219)
HSL	hsl(237, 66%, 58%)
HSV	hsv(237, 64%, 86%)
CMYK	cmyk(63.9%, 60.3%, 0%, 14.1%)
CIE-LAB	lab(43.64, 37.39, -68.63)
CIE-LCH	lch(43.64, 78.15, 298.58°)
OKLab	oklab(52.92% 0.0163 -0.1977)
OKLCH	oklch(52.92% 0.198 274.7)
XYZ	xyz(19.4146, 13.5915, 68.6044)
Luminance	0.1359 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4F57DB #DBD34F

analogous

#4F9DDB #4F57DB #8D4FDB

triadic

#4F57DB #DB4F57 #57DB4F

tetradic

#4F57DB #DB4F9D #DBD34F #4FDB8D

square

#4F57DB #DB4F9D #DBD34F #4FDB8D

split-complementary

#4F57DB #DB8D4F #9DDB4F

monochromatic

#1E2492 #2831C5 #4F57DB #8287E5 #B5B8F0

Accessibility & contrast

On white

5.65

#4F57DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#4F57DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4F57DB

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4F57DB	#FFFFFF	#000000	##FFFFFF
##4F57DB	1.00	5.65	3.72	5.65
#FFFFFF	5.65	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DDF

Deuteranopia (green-blind)

#0061D8

Tritanopia (blue-blind)

#007891

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #4f57db;
/* rgb */ color: rgb(79, 87, 219);
/* oklch */ color: oklch(52.9% 0.198 274.7);

Tailwind

colors: {
  custom: {
    50: '#8f86e7',
    500: '#4f57db',
    950: '#000000',
  },
}

SCSS

$custom: #4f57db;
$custom-light: #8f86e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4f57db",
  "rgb": {
    "r": 79,
    "g": 87,
    "b": 219
  },
  "hsl": {
    "h": 236.571,
    "s": 66.038,
    "l": 58.431
  },
  "oklch": {
    "l": 0.52916,
    "c": 0.19833,
    "h": 274.7
  },
  "luminance": 0.13593
}

Semantic roles & 50–950 ramp

primary

#4F57DB

secondary

#DFDCA7

accent

#DF3FE9

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0B16

muted

#7E7C84

Preview Lab

Preview with #4F57DB

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

Preview Lab → · Contrast checker → · Palette generator →