#577CB3#577CB3

#577CB3 is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.2% C 0.095 H 258.1°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#577CB3
RGB	rgb(87, 124, 179)
HSL	hsl(216, 38%, 52%)
HSV	hsv(216, 51%, 70%)
CMYK	cmyk(51.4%, 30.7%, 0%, 29.8%)
CIE-LAB	lab(51.49, 2.84, -33.08)
CIE-LCH	lch(51.49, 33.20, 274.90°)
OKLab	oklab(58.24% -0.0196 -0.0929)
OKLCH	oklch(58.24% 0.095 258.1)
XYZ	xyz(19.2721, 19.6948, 45.4250)
Luminance	0.1970 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB3 #B38E57

analogous

#57AAB3 #577CB3 #6057B3

triadic

#577CB3 #B3577C #7CB357

tetradic

#577CB3 #B357AA #B38E57 #57B360

square

#577CB3 #B357AA #B38E57 #57B360

split-complementary

#577CB3 #B36057 #AAB357

monochromatic

#2D4363 #405F8D #577CB3 #819DC6 #ABBED9

Accessibility & contrast

On white

4.25

#577CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#577CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB3

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB3	#FFFFFF	#000000	##000000
##577CB3	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B5

Deuteranopia (green-blind)

#5B77B2

Tritanopia (blue-blind)

#2A8890

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb3;
/* rgb */ color: rgb(87, 124, 179);
/* oklch */ color: oklch(58.2% 0.095 258.1);

Tailwind

colors: {
  custom: {
    50: '#8ca1ca',
    500: '#577cb3',
    950: '#000000',
  },
}

SCSS

$custom: #577cb3;
$custom-light: #8ca1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb3",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 179
  },
  "hsl": {
    "h": 215.87,
    "s": 37.705,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58241,
    "c": 0.09497,
    "h": 258.1
  },
  "luminance": 0.19696
}

Semantic roles & 50–950 ramp

primary

#577CB3

secondary

#C7B79F

accent

#9F5ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577CB3

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

Preview Lab → · Contrast checker → · Palette generator →