#577CB5#577CB5

#577CB5 is a mid, moderate blue. Relative luminance 0.198; OKLCH L 58.3% C 0.098 H 258.8°. Best body text is #000000 at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#577CB5
RGB	rgb(87, 124, 181)
HSL	hsl(216, 39%, 53%)
HSV	hsv(216, 52%, 71%)
CMYK	cmyk(51.9%, 31.5%, 0%, 29%)
CIE-LAB	lab(51.58, 3.47, -34.09)
CIE-LCH	lch(51.58, 34.26, 275.81°)
OKLab	oklab(58.34% -0.019 -0.0958)
OKLCH	oklch(58.34% 0.098 258.8)
XYZ	xyz(19.4758, 19.7763, 46.4980)
Luminance	0.1978 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB5 #B59057

analogous

#57ABB5 #577CB5 #6157B5

triadic

#577CB5 #B5577C #7CB557

tetradic

#577CB5 #B557AB #B59057 #57B561

square

#577CB5 #B557AB #B59057 #57B561

split-complementary

#577CB5 #B56157 #ABB557

monochromatic

#2D4365 #3F5F90 #577CB5 #819DC8 #ACBEDA

Accessibility & contrast

On white

4.24

#577CB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.96

#577CB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB5

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB5	#FFFFFF	#000000	##000000
##577CB5	1.00	4.24	4.96	4.96
#FFFFFF	4.24	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)

#6680B7

Deuteranopia (green-blind)

#5A77B4

Tritanopia (blue-blind)

#288990

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb5;
/* rgb */ color: rgb(87, 124, 181);
/* oklch */ color: oklch(58.3% 0.098 258.8);

Tailwind

colors: {
  custom: {
    50: '#8ca1cb',
    500: '#577cb5',
    950: '#000000',
  },
}

SCSS

$custom: #577cb5;
$custom-light: #8ca1cb;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb5",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 181
  },
  "hsl": {
    "h": 216.383,
    "s": 38.843,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58344,
    "c": 0.09772,
    "h": 258.8
  },
  "luminance": 0.19778
}

Semantic roles & 50–950 ramp

primary

#577CB5

secondary

#C8B89F

accent

#A059CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577CB5

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

Preview Lab → · Contrast checker → · Palette generator →