#577CDB#577CDB

#577CDB is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.5% C 0.150 H 266.0°. Best body text is #000000 at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#577CDB
RGB	rgb(87, 124, 219)
HSL	hsl(223, 65%, 60%)
HSV	hsv(223, 60%, 86%)
CMYK	cmyk(60.3%, 43.4%, 0%, 14.1%)
CIE-LAB	lab(53.55, 15.89, -52.62)
CIE-LCH	lch(53.55, 54.97, 286.80°)
OKLab	oklab(60.51% -0.0104 -0.15)
OKLCH	oklch(60.51% 0.15 266)
XYZ	xyz(23.9199, 21.5540, 69.9039)
Luminance	0.2156 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CDB #DBB657

analogous

#57BEDB #577CDB #7457DB

triadic

#577CDB #DB577C #7CDB57

tetradic

#577CDB #DB57BE #DBB657 #57DB74

square

#577CDB #DB57BE #DBB657 #57DB74

split-complementary

#577CDB #DB7457 #BEDB57

monochromatic

#204297 #2B58CA #577CDB #89A3E6 #BCCBF1

Accessibility & contrast

On white

3.95

#577CDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.31

#577CDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CDB

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CDB	#FFFFFF	#000000	##000000
##577CDB	1.00	3.95	5.31	5.31
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.31	21.00	1.00	1.00
##000000	5.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5186DF

Deuteranopia (green-blind)

#3D7AD9

Tritanopia (blue-blind)

#0091A1

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #577cdb;
/* rgb */ color: rgb(87, 124, 219);
/* oklch */ color: oklch(60.5% 0.150 266.0);

Tailwind

colors: {
  custom: {
    50: '#91a1e7',
    500: '#577cdb',
    950: '#000000',
  },
}

SCSS

$custom: #577cdb;
$custom-light: #91a1e7;
$custom-dark: #000000;

JSON

{
  "hex": "#577cdb",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 219
  },
  "hsl": {
    "h": 223.182,
    "s": 64.706,
    "l": 60
  },
  "oklch": {
    "l": 0.60509,
    "c": 0.15034,
    "h": 266
  },
  "luminance": 0.21556
}

Semantic roles & 50–950 ramp

primary

#577CDB

secondary

#E0D2AD

accent

#B940E8

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577CDB

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

Preview Lab → · Contrast checker → · Palette generator →