#577BB4#577BB4

#577BB4 is a mid, moderate blue. Relative luminance 0.195; OKLCH L 58.1% C 0.097 H 259.3°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#577BB4
RGB	rgb(87, 123, 180)
HSL	hsl(217, 38%, 52%)
HSV	hsv(217, 52%, 71%)
CMYK	cmyk(51.7%, 31.7%, 0%, 29.4%)
CIE-LAB	lab(51.25, 3.75, -34.03)
CIE-LCH	lch(51.25, 34.24, 276.29°)
OKLab	oklab(58.07% -0.0181 -0.0957)
OKLCH	oklch(58.07% 0.097 259.3)
XYZ	xyz(19.2489, 19.4860, 45.9180)
Luminance	0.1949 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB4 #B49057

analogous

#57AAB4 #577BB4 #6157B4

triadic

#577BB4 #B4577B #7BB457

tetradic

#577BB4 #B457AA #B49057 #57B461

square

#577BB4 #B457AA #B49057 #57B461

split-complementary

#577BB4 #B46157 #AAB457

monochromatic

#2D4264 #405E8E #577BB4 #819CC7 #ACBDDA

Accessibility & contrast

On white

4.29

#577BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#577BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB4

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB4	#FFFFFF	#000000	##000000
##577BB4	1.00	4.29	4.90	4.90
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657FB6

Deuteranopia (green-blind)

#5A76B3

Tritanopia (blue-blind)

#2A888F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb4;
/* rgb */ color: rgb(87, 123, 180);
/* oklch */ color: oklch(58.1% 0.097 259.3);

Tailwind

colors: {
  custom: {
    50: '#8ca0ca',
    500: '#577bb4',
    950: '#000000',
  },
}

SCSS

$custom: #577bb4;
$custom-light: #8ca0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb4",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 180
  },
  "hsl": {
    "h": 216.774,
    "s": 38.272,
    "l": 52.353
  },
  "oklch": {
    "l": 0.58069,
    "c": 0.09738,
    "h": 259.3
  },
  "luminance": 0.19487
}

Semantic roles & 50–950 ramp

primary

#577BB4

secondary

#C8B89F

accent

#A15ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577BB4

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

Preview Lab → · Contrast checker → · Palette generator →