#577BE4#577BE4

#577BE4 is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.9% C 0.164 H 267.2°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#577BE4
RGB	rgb(87, 123, 228)
HSL	hsl(225, 72%, 62%)
HSV	hsv(225, 62%, 89%)
CMYK	cmyk(61.8%, 46.1%, 0%, 10.6%)
CIE-LAB	lab(53.80, 19.53, -57.27)
CIE-LCH	lch(53.80, 60.51, 288.83°)
OKLab	oklab(60.87% -0.008 -0.1636)
OKLCH	oklch(60.87% 0.164 267.2)
XYZ	xyz(25.0122, 21.7914, 76.2718)
Luminance	0.2179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BE4 #E4C057

analogous

#57C2E4 #577BE4 #7A57E4

triadic

#577BE4 #E4577B #7BE457

tetradic

#577BE4 #E457C2 #E4C057 #57E47A

square

#577BE4 #E457C2 #E4C057 #57E47A

split-complementary

#577BE4 #E47A57 #C2E457

monochromatic

#1B3EA6 #2352DB #577BE4 #8CA4EC #C0CEF5

Accessibility & contrast

On white

3.92

#577BE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#577BE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BE4

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BE4	#FFFFFF	#000000	##000000
##577BE4	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4887E8

Deuteranopia (green-blind)

#2F7BE2

Tritanopia (blue-blind)

#0093A4

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577be4;
/* rgb */ color: rgb(87, 123, 228);
/* oklch */ color: oklch(60.9% 0.164 267.2);

Tailwind

colors: {
  custom: {
    50: '#93a0ed',
    500: '#577be4',
    950: '#000000',
  },
}

SCSS

$custom: #577be4;
$custom-light: #93a0ed;
$custom-dark: #000000;

JSON

{
  "hex": "#577be4",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 228
  },
  "hsl": {
    "h": 224.681,
    "s": 72.308,
    "l": 61.765
  },
  "oklch": {
    "l": 0.60872,
    "c": 0.16384,
    "h": 267.2
  },
  "luminance": 0.21794
}

Semantic roles & 50–950 ramp

primary

#577BE4

secondary

#E6D8B1

accent

#A311D4

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577BE4

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

Preview Lab → · Contrast checker → · Palette generator →