#577CB6#577CB6

#577CB6 is a mid, moderate blue. Relative luminance 0.198; OKLCH L 58.4% C 0.099 H 259.1°. Best body text is #000000 at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#577CB6
RGB	rgb(87, 124, 182)
HSL	hsl(217, 39%, 53%)
HSV	hsv(217, 52%, 71%)
CMYK	cmyk(52.2%, 31.9%, 0%, 28.6%)
CIE-LAB	lab(51.63, 3.78, -34.59)
CIE-LCH	lch(51.63, 34.80, 276.24°)
OKLab	oklab(58.4% -0.0187 -0.0973)
OKLCH	oklch(58.4% 0.099 259.1)
XYZ	xyz(19.5788, 19.8175, 47.0403)
Luminance	0.1982 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB6 #B69157

analogous

#57ABB6 #577CB6 #6257B6

triadic

#577CB6 #B6577C #7CB657

tetradic

#577CB6 #B657AB #B69157 #57B662

square

#577CB6 #B657AB #B69157 #57B662

split-complementary

#577CB6 #B66257 #ABB657

monochromatic

#2C4366 #3F5F91 #577CB6 #829DC9 #ACBFDB

Accessibility & contrast

On white

4.23

#577CB6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.96

#577CB6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB6

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB6	#FFFFFF	#000000	##000000
##577CB6	1.00	4.23	4.96	4.96
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.96	21.00	1.00	1.00
##000000	4.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6580B8

Deuteranopia (green-blind)

#5A77B5

Tritanopia (blue-blind)

#278991

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb6;
/* rgb */ color: rgb(87, 124, 182);
/* oklch */ color: oklch(58.4% 0.099 259.1);

Tailwind

colors: {
  custom: {
    50: '#8ca1cc',
    500: '#577cb6',
    950: '#000000',
  },
}

SCSS

$custom: #577cb6;
$custom-light: #8ca1cc;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb6",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 182
  },
  "hsl": {
    "h": 216.632,
    "s": 39.419,
    "l": 52.745
  },
  "oklch": {
    "l": 0.58396,
    "c": 0.09909,
    "h": 259.1
  },
  "luminance": 0.19819
}

Semantic roles & 50–950 ramp

primary

#577CB6

secondary

#C9B9A0

accent

#A158CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577CB6

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

Preview Lab → · Contrast checker → · Palette generator →