#577BEB#577BEB

#577BEB is a mid, vivid blue. Relative luminance 0.222; OKLCH L 61.3% C 0.173 H 267.7°. Best body text is #000000 at 5.44:1 contrast (WCAG AA passes).

Color values

HEX	#577BEB
RGB	rgb(87, 123, 235)
HSL	hsl(225, 79%, 63%)
HSV	hsv(225, 63%, 92%)
CMYK	cmyk(63%, 47.7%, 0%, 7.8%)
CIE-LAB	lab(54.23, 21.89, -60.51)
CIE-LCH	lch(54.23, 64.35, 289.89°)
OKLab	oklab(61.33% -0.007 -0.1732)
OKLCH	oklch(61.33% 0.173 267.7)
XYZ	xyz(26.0037, 22.1880, 81.4935)
Luminance	0.2219 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BEB #EBC757

analogous

#57C5EB #577BEB #7D57EB

triadic

#577BEB #EB577B #7BEB57

tetradic

#577BEB #EB57C5 #EBC757 #57EB7D

square

#577BEB #EB57C5 #EBC757 #57EB7D

split-complementary

#577BEB #EB7D57 #C5EB57

monochromatic

#153BB2 #2050E4 #577BEB #8EA6F2 #C4D1F8

Accessibility & contrast

On white

3.86

#577BEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.44

#577BEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BEB

5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BEB	#FFFFFF	#000000	##000000
##577BEB	1.00	3.86	5.44	5.44
#FFFFFF	3.86	1.00	21.00	21.00
#000000	5.44	21.00	1.00	1.00
##000000	5.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4189EF

Deuteranopia (green-blind)

#227BE9

Tritanopia (blue-blind)

#0095A8

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #577beb;
/* rgb */ color: rgb(87, 123, 235);
/* oklch */ color: oklch(61.3% 0.173 267.7);

Tailwind

colors: {
  custom: {
    50: '#94a0f2',
    500: '#577beb',
    950: '#000000',
  },
}

SCSS

$custom: #577beb;
$custom-light: #94a0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#577beb",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 235
  },
  "hsl": {
    "h": 225.405,
    "s": 78.723,
    "l": 63.137
  },
  "oklch": {
    "l": 0.61329,
    "c": 0.17332,
    "h": 267.7
  },
  "luminance": 0.2219
}

Semantic roles & 50–950 ramp

primary

#577BEB

secondary

#E9DDB4

accent

#A80ADB

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #577BEB

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

Preview Lab → · Contrast checker → · Palette generator →