#577AB7#577AB7

#577AB7 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 58.0% C 0.103 H 261.0°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#577AB7
RGB	rgb(87, 122, 183)
HSL	hsl(218, 40%, 53%)
HSV	hsv(218, 52%, 72%)
CMYK	cmyk(52.5%, 33.3%, 0%, 28.2%)
CIE-LAB	lab(51.11, 5.30, -35.98)
CIE-LCH	lch(51.11, 36.37, 278.38°)
OKLab	oklab(58.01% -0.0161 -0.1014)
OKLCH	oklch(58.01% 0.103 261)
XYZ	xyz(19.4344, 19.3628, 47.5038)
Luminance	0.1936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AB7 #B79457

analogous

#57AAB7 #577AB7 #6457B7

triadic

#577AB7 #B7577A #7AB757

tetradic

#577AB7 #B757AA #B79457 #57B764

square

#577AB7 #B757AA #B79457 #57B764

split-complementary

#577AB7 #B76457 #AAB757

monochromatic

#2C4267 #3F5D92 #577AB7 #829CC9 #ADBEDC

Accessibility & contrast

On white

4.31

#577AB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#577AB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AB7

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AB7	#FFFFFF	#000000	##000000
##577AB7	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627FBA

Deuteranopia (green-blind)

#5776B6

Tritanopia (blue-blind)

#278790

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577ab7;
/* rgb */ color: rgb(87, 122, 183);
/* oklch */ color: oklch(58.0% 0.103 261.0);

Tailwind

colors: {
  custom: {
    50: '#8ca0cd',
    500: '#577ab7',
    950: '#000000',
  },
}

SCSS

$custom: #577ab7;
$custom-light: #8ca0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577ab7",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 183
  },
  "hsl": {
    "h": 218.125,
    "s": 40,
    "l": 52.941
  },
  "oklch": {
    "l": 0.58005,
    "c": 0.10263,
    "h": 261
  },
  "luminance": 0.19364
}

Semantic roles & 50–950 ramp

primary

#577AB7

secondary

#CABBA0

accent

#A458D0

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577AB7

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

Preview Lab → · Contrast checker → · Palette generator →