#577DEB#577DEB

#577DEB is a mid, vivid blue. Relative luminance 0.227; OKLCH L 61.7% C 0.171 H 267.0°. Best body text is #000000 at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#577DEB
RGB	rgb(87, 125, 235)
HSL	hsl(225, 79%, 63%)
HSV	hsv(225, 63%, 92%)
CMYK	cmyk(63%, 46.8%, 0%, 7.8%)
CIE-LAB	lab(54.75, 20.67, -59.66)
CIE-LCH	lch(54.75, 63.14, 289.11°)
OKLab	oklab(61.73% -0.0089 -0.1707)
OKLCH	oklch(61.73% 0.171 267)
XYZ	xyz(26.2543, 22.6893, 81.5770)
Luminance	0.2269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DEB #EBC557

analogous

#57C7EB #577DEB #7B57EB

triadic

#577DEB #EB577D #7DEB57

tetradic

#577DEB #EB57C7 #EBC557 #57EB7B

square

#577DEB #EB57C7 #EBC557 #57EB7B

split-complementary

#577DEB #EB7B57 #C7EB57

monochromatic

#153EB2 #2053E4 #577DEB #8EA7F2 #C4D2F8

Accessibility & contrast

On white

3.79

#577DEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.54

#577DEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DEB

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DEB	#FFFFFF	#000000	##000000
##577DEB	1.00	3.79	5.54	5.54
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.54	21.00	1.00	1.00
##000000	5.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#458AEF

Deuteranopia (green-blind)

#297DE9

Tritanopia (blue-blind)

#0096A9

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #577deb;
/* rgb */ color: rgb(87, 125, 235);
/* oklch */ color: oklch(61.7% 0.171 267.0);

Tailwind

colors: {
  custom: {
    50: '#94a2f2',
    500: '#577deb',
    950: '#000000',
  },
}

SCSS

$custom: #577deb;
$custom-light: #94a2f2;
$custom-dark: #000000;

JSON

{
  "hex": "#577deb",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 235
  },
  "hsl": {
    "h": 224.595,
    "s": 78.723,
    "l": 63.137
  },
  "oklch": {
    "l": 0.61729,
    "c": 0.1709,
    "h": 267
  },
  "luminance": 0.22692
}

Semantic roles & 50–950 ramp

primary

#577DEB

secondary

#E9DCB4

accent

#A50ADB

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0F17

muted

#7E7E85

Preview Lab

Preview with #577DEB

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

Preview Lab → · Contrast checker → · Palette generator →