#577CB4#577CB4

#577CB4 is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.3% C 0.096 H 258.4°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#577CB4
RGB	rgb(87, 124, 180)
HSL	hsl(216, 38%, 52%)
HSV	hsv(216, 52%, 71%)
CMYK	cmyk(51.7%, 31.1%, 0%, 29.4%)
CIE-LAB	lab(51.54, 3.15, -33.58)
CIE-LCH	lch(51.54, 33.73, 275.36°)
OKLab	oklab(58.29% -0.0193 -0.0944)
OKLCH	oklch(58.29% 0.096 258.4)
XYZ	xyz(19.3736, 19.7354, 45.9596)
Luminance	0.1974 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CB4 #B48F57

analogous

#57ABB4 #577CB4 #6057B4

triadic

#577CB4 #B4577C #7CB457

tetradic

#577CB4 #B457AB #B48F57 #57B460

square

#577CB4 #B457AB #B48F57 #57B460

split-complementary

#577CB4 #B46057 #ABB457

monochromatic

#2D4364 #405F8E #577CB4 #819DC7 #ACBEDA

Accessibility & contrast

On white

4.24

#577CB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#577CB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CB4

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CB4	#FFFFFF	#000000	##000000
##577CB4	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6680B6

Deuteranopia (green-blind)

#5B77B3

Tritanopia (blue-blind)

#298890

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577cb4;
/* rgb */ color: rgb(87, 124, 180);
/* oklch */ color: oklch(58.3% 0.096 258.4);

Tailwind

colors: {
  custom: {
    50: '#8ca1ca',
    500: '#577cb4',
    950: '#000000',
  },
}

SCSS

$custom: #577cb4;
$custom-light: #8ca1ca;
$custom-dark: #000000;

JSON

{
  "hex": "#577cb4",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 180
  },
  "hsl": {
    "h": 216.129,
    "s": 38.272,
    "l": 52.353
  },
  "oklch": {
    "l": 0.58292,
    "c": 0.09634,
    "h": 258.4
  },
  "luminance": 0.19737
}

Semantic roles & 50–950 ramp

primary

#577CB4

secondary

#C8B89F

accent

#A05ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #577CB4

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

Preview Lab → · Contrast checker → · Palette generator →