#577BDD#577BDD

#577BDD is a mid, vivid blue. Relative luminance 0.214; OKLCH L 60.4% C 0.154 H 266.6°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#577BDD
RGB	rgb(87, 123, 221)
HSL	hsl(224, 66%, 60%)
HSV	hsv(224, 61%, 87%)
CMYK	cmyk(60.6%, 44.3%, 0%, 13.3%)
CIE-LAB	lab(53.40, 17.17, -53.99)
CIE-LCH	lch(53.40, 56.66, 287.64°)
OKLab	oklab(60.43% -0.009 -0.154)
OKLCH	oklch(60.43% 0.154 266.6)
XYZ	xyz(24.0601, 21.4106, 71.2573)
Luminance	0.2141 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BDD #DDB957

analogous

#57BEDD #577BDD #7657DD

triadic

#577BDD #DD577B #7BDD57

tetradic

#577BDD #DD57BE #DDB957 #57DD76

square

#577BDD #DD57BE #DDB957 #57DD76

split-complementary

#577BDD #DD7657 #BEDD57

monochromatic

#1F409A #2A56CD #577BDD #8AA3E7 #BDCBF2

Accessibility & contrast

On white

3.98

#577BDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.28

#577BDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BDD

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BDD	#FFFFFF	#000000	##000000
##577BDD	1.00	3.98	5.28	5.28
#FFFFFF	3.98	1.00	21.00	21.00
#000000	5.28	21.00	1.00	1.00
##000000	5.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D86E1

Deuteranopia (green-blind)

#397ADB

Tritanopia (blue-blind)

#0091A1

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #577bdd;
/* rgb */ color: rgb(87, 123, 221);
/* oklch */ color: oklch(60.4% 0.154 266.6);

Tailwind

colors: {
  custom: {
    50: '#92a0e8',
    500: '#577bdd',
    950: '#000000',
  },
}

SCSS

$custom: #577bdd;
$custom-light: #92a0e8;
$custom-dark: #000000;

JSON

{
  "hex": "#577bdd",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 221
  },
  "hsl": {
    "h": 223.881,
    "s": 66.337,
    "l": 60.392
  },
  "oklch": {
    "l": 0.60427,
    "c": 0.1543,
    "h": 266.6
  },
  "luminance": 0.21413
}

Semantic roles & 50–950 ramp

primary

#577BDD

secondary

#E1D4AE

accent

#9D17CE

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577BDD

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

Preview Lab → · Contrast checker → · Palette generator →