#577CB0#577CB0

#577CB0 is a mid, moderate blue. Relative luminance 0.196; OKLCH L 58.1% C 0.091 H 257.0°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#577CB0
RGB	rgb(87, 124, 176)
HSL	hsl(215, 36%, 52%)
HSV	hsv(215, 51%, 69%)
CMYK	cmyk(50.6%, 29.5%, 0%, 31%)
CIE-LAB	lab(51.35, 1.89, -31.56)
CIE-LCH	lch(51.35, 31.62, 273.44°)
OKLab	oklab(58.09% -0.0205 -0.0885)
OKLCH	oklch(58.09% 0.091 257)
XYZ	xyz(18.9719, 19.5748, 43.8445)
Luminance	0.1958 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB0 #B08B57

analogous

#57A9B0 #577CB0 #5F57B0

triadic

#577CB0 #B0577C #7CB057

tetradic

#577CB0 #B057A9 #B08B57 #57B05F

square

#577CB0 #B057A9 #B08B57 #57B05F

split-complementary

#577CB0 #B05F57 #A9B057

monochromatic

#2D4260 #415F89 #577CB0 #819CC4 #AABDD7

Accessibility & contrast

On white

4.27

#577CB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#577CB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB0

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB0	#FFFFFF	#000000	##000000
##577CB0	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#687FB2

Deuteranopia (green-blind)

#5D77AF

Tritanopia (blue-blind)

#2D878E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577cb0;
/* rgb */ color: rgb(87, 124, 176);
/* oklch */ color: oklch(58.1% 0.091 257.0);

Tailwind

colors: {
  custom: {
    50: '#8ca1c8',
    500: '#577cb0',
    950: '#000000',
  },
}

SCSS

$custom: #577cb0;
$custom-light: #8ca1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb0",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 176
  },
  "hsl": {
    "h": 215.056,
    "s": 36.032,
    "l": 51.569
  },
  "oklch": {
    "l": 0.58088,
    "c": 0.09087,
    "h": 257
  },
  "luminance": 0.19576
}

Semantic roles & 50–950 ramp

primary

#577CB0

secondary

#C5B59E

accent

#9D5CCC

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577CB0

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

Preview Lab → · Contrast checker → · Palette generator →