#577CDD#577CDD

#577CDD is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.6% C 0.153 H 266.2°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#577CDD
RGB	rgb(87, 124, 221)
HSL	hsl(223, 66%, 60%)
HSV	hsv(223, 61%, 87%)
CMYK	cmyk(60.6%, 43.9%, 0%, 13.3%)
CIE-LAB	lab(53.66, 16.56, -53.56)
CIE-LCH	lch(53.66, 56.07, 287.18°)
OKLab	oklab(60.63% -0.01 -0.1528)
OKLCH	oklch(60.63% 0.153 266.2)
XYZ	xyz(24.1848, 21.6599, 71.2989)
Luminance	0.2166 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CDD #DDB857

analogous

#57BFDD #577CDD #7557DD

triadic

#577CDD #DD577C #7CDD57

tetradic

#577CDD #DD57BF #DDB857 #57DD75

square

#577CDD #DD57BF #DDB857 #57DD75

split-complementary

#577CDD #DD7557 #BFDD57

monochromatic

#1F419A #2A57CD #577CDD #8AA4E7 #BDCBF2

Accessibility & contrast

On white

3.94

#577CDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#577CDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CDD

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CDD	#FFFFFF	#000000	##000000
##577CDD	1.00	3.94	5.33	5.33
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.33	21.00	1.00	1.00
##000000	5.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F87E1

Deuteranopia (green-blind)

#3B7BDB

Tritanopia (blue-blind)

#0092A2

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #577cdd;
/* rgb */ color: rgb(87, 124, 221);
/* oklch */ color: oklch(60.6% 0.153 266.2);

Tailwind

colors: {
  custom: {
    50: '#92a1e8',
    500: '#577cdd',
    950: '#000000',
  },
}

SCSS

$custom: #577cdd;
$custom-light: #92a1e8;
$custom-dark: #000000;

JSON

{
  "hex": "#577cdd",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 221
  },
  "hsl": {
    "h": 223.433,
    "s": 66.337,
    "l": 60.392
  },
  "oklch": {
    "l": 0.60633,
    "c": 0.15309,
    "h": 266.2
  },
  "luminance": 0.21662
}

Semantic roles & 50–950 ramp

primary

#577CDD

secondary

#E1D3AE

accent

#9C17CE

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577CDD

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

Preview Lab → · Contrast checker → · Palette generator →