#577BE5#577BE5

#577BE5 is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.9% C 0.165 H 267.3°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#577BE5
RGB	rgb(87, 123, 229)
HSL	hsl(225, 73%, 62%)
HSV	hsv(225, 62%, 90%)
CMYK	cmyk(62%, 46.3%, 0%, 10.2%)
CIE-LAB	lab(53.86, 19.87, -57.73)
CIE-LCH	lch(53.86, 61.06, 288.99°)
OKLab	oklab(60.94% -0.0078 -0.165)
OKLCH	oklch(60.94% 0.165 267.3)
XYZ	xyz(25.1515, 21.8471, 77.0050)
Luminance	0.2185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BE5 #E5C157

analogous

#57C2E5 #577BE5 #7A57E5

triadic

#577BE5 #E5577B #7BE557

tetradic

#577BE5 #E557C2 #E5C157 #57E57A

square

#577BE5 #E557C2 #E5C157 #57E57A

split-complementary

#577BE5 #E57A57 #C2E557

monochromatic

#1A3EA8 #2251DD #577BE5 #8CA5ED #C1CEF5

Accessibility & contrast

On white

3.91

#577BE5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#577BE5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BE5

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BE5	#FFFFFF	#000000	##000000
##577BE5	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4788E9

Deuteranopia (green-blind)

#2E7BE3

Tritanopia (blue-blind)

#0093A5

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577be5;
/* rgb */ color: rgb(87, 123, 229);
/* oklch */ color: oklch(60.9% 0.165 267.3);

Tailwind

colors: {
  custom: {
    50: '#93a0ee',
    500: '#577be5',
    950: '#000000',
  },
}

SCSS

$custom: #577be5;
$custom-light: #93a0ee;
$custom-dark: #000000;

JSON

{
  "hex": "#577be5",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 229
  },
  "hsl": {
    "h": 224.789,
    "s": 73.196,
    "l": 61.961
  },
  "oklch": {
    "l": 0.60937,
    "c": 0.16521,
    "h": 267.3
  },
  "luminance": 0.21849
}

Semantic roles & 50–950 ramp

primary

#577BE5

secondary

#E6D9B2

accent

#A310D5

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577BE5

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

Preview Lab → · Contrast checker → · Palette generator →