#577CB8#577CB8

#577CB8 is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.5% C 0.102 H 259.7°. Best body text is #000000 at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#577CB8
RGB	rgb(87, 124, 184)
HSL	hsl(217, 41%, 53%)
HSV	hsv(217, 53%, 72%)
CMYK	cmyk(52.7%, 32.6%, 0%, 27.8%)
CIE-LAB	lab(51.72, 4.42, -35.59)
CIE-LCH	lch(51.72, 35.87, 277.08°)
OKLab	oklab(58.5% -0.0182 -0.1002)
OKLCH	oklch(58.5% 0.102 259.7)
XYZ	xyz(19.7869, 19.9008, 48.1366)
Luminance	0.1990 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB8 #B89357

analogous

#57ADB8 #577CB8 #6257B8

triadic

#577CB8 #B8577C #7CB857

tetradic

#577CB8 #B857AD #B89357 #57B862

square

#577CB8 #B857AD #B89357 #57B862

split-complementary

#577CB8 #B86257 #ADB857

monochromatic

#2C4368 #3E5F93 #577CB8 #829ECA #ADBFDC

Accessibility & contrast

On white

4.22

#577CB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.98

#577CB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB8

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB8	#FFFFFF	#000000	##000000
##577CB8	1.00	4.22	4.98	4.98
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.98	21.00	1.00	1.00
##000000	4.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6480BB

Deuteranopia (green-blind)

#5977B7

Tritanopia (blue-blind)

#258992

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb8;
/* rgb */ color: rgb(87, 124, 184);
/* oklch */ color: oklch(58.5% 0.102 259.7);

Tailwind

colors: {
  custom: {
    50: '#8ca1cd',
    500: '#577cb8',
    950: '#000000',
  },
}

SCSS

$custom: #577cb8;
$custom-light: #8ca1cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb8",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 184
  },
  "hsl": {
    "h": 217.113,
    "s": 40.586,
    "l": 53.137
  },
  "oklch": {
    "l": 0.58501,
    "c": 0.10185,
    "h": 259.7
  },
  "luminance": 0.19902
}

Semantic roles & 50–950 ramp

primary

#577CB8

secondary

#CABAA0

accent

#A257D0

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577CB8

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

Preview Lab → · Contrast checker → · Palette generator →