#577B9F#577B9F

#577B9F is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 57.0% C 0.069 H 249.1°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#577B9F
RGB	rgb(87, 123, 159)
HSL	hsl(210, 29%, 48%)
HSV	hsv(210, 45%, 62%)
CMYK	cmyk(45.3%, 22.6%, 0%, 37.6%)
CIE-LAB	lab(50.33, -2.70, -23.29)
CIE-LCH	lch(50.33, 23.44, 263.38°)
OKLab	oklab(57.04% -0.0247 -0.0648)
OKLCH	oklch(57.04% 0.069 249.1)
XYZ	xyz(17.2693, 18.6942, 35.4925)
Luminance	0.1870 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577B9F #9F7B57

analogous

#579F9F #577B9F #57579F

triadic

#577B9F #9F577B #7B9F57

tetradic

#577B9F #9F579F #9F7B57 #579F57

square

#577B9F #9F579F #9F7B57 #579F57

split-complementary

#577B9F #9F5757 #9F9F57

monochromatic

#2C3E50 #415C77 #577B9F #7C9AB7 #A3B8CD

Accessibility & contrast

On white

4.43

#577B9F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#577B9F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577B9F

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577B9F	#FFFFFF	#000000	##000000
##577B9F	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7CA1

Deuteranopia (green-blind)

#64759E

Tritanopia (blue-blind)

#3A8387

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #577b9f;
/* rgb */ color: rgb(87, 123, 159);
/* oklch */ color: oklch(57.0% 0.069 249.1);

Tailwind

colors: {
  custom: {
    50: '#8aa1bb',
    500: '#577b9f',
    950: '#000000',
  },
}

SCSS

$custom: #577b9f;
$custom-light: #8aa1bb;
$custom-dark: #000000;

JSON

{
  "hex": "#577b9f",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 159
  },
  "hsl": {
    "h": 210,
    "s": 29.268,
    "l": 48.235
  },
  "oklch": {
    "l": 0.57041,
    "c": 0.06931,
    "h": 249.1
  },
  "luminance": 0.18695
}

Semantic roles & 50–950 ramp

primary

#577B9F

secondary

#BBA997

accent

#9462C6

background

#F8F9FB

surface

#F0F2F6

border

#CBCCD0

text

#0C0E12

muted

#7D7E81

Preview Lab

Preview with #577B9F

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

Preview Lab → · Contrast checker → · Palette generator →