#577B9B#577B9B

#577B9B is a mid, moderate cyan. Relative luminance 0.186; OKLCH L 56.9% C 0.064 H 246.1°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#577B9B
RGB	rgb(87, 123, 155)
HSL	hsl(208, 28%, 47%)
HSV	hsv(208, 44%, 61%)
CMYK	cmyk(43.9%, 20.6%, 0%, 39.2%)
CIE-LAB	lab(50.17, -3.88, -21.20)
CIE-LCH	lch(50.17, 21.55, 259.62°)
OKLab	oklab(56.86% -0.0261 -0.0588)
OKLCH	oklch(56.86% 0.064 246.1)
XYZ	xyz(16.9278, 18.5576, 33.6940)
Luminance	0.1856 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577B9B #9B7757

analogous

#579B99 #577B9B #57599B

triadic

#577B9B #9B577B #7B9B57

tetradic

#577B9B #99579B #9B7757 #599B57

square

#577B9B #99579B #9B7757 #599B57

split-complementary

#577B9B #9B5759 #9B9957

monochromatic

#2B3D4D #415C74 #577B9B #7B99B5 #A2B7CB

Accessibility & contrast

On white

4.46

#577B9B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#577B9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577B9B

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577B9B	#FFFFFF	#000000	##000000
##577B9B	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E7B9D

Deuteranopia (green-blind)

#65749A

Tritanopia (blue-blind)

#3C8386

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #577b9b;
/* rgb */ color: rgb(87, 123, 155);
/* oklch */ color: oklch(56.9% 0.064 246.1);

Tailwind

colors: {
  custom: {
    50: '#89a1b8',
    500: '#577b9b',
    950: '#000000',
  },
}

SCSS

$custom: #577b9b;
$custom-light: #89a1b8;
$custom-dark: #000000;

JSON

{
  "hex": "#577b9b",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 155
  },
  "hsl": {
    "h": 208.235,
    "s": 28.099,
    "l": 47.451
  },
  "oklch": {
    "l": 0.5686,
    "c": 0.06435,
    "h": 246.1
  },
  "luminance": 0.18559
}

Semantic roles & 50–950 ramp

primary

#577B9B

secondary

#B8A696

accent

#9163C4

background

#F8F9FB

surface

#F0F2F6

border

#CBCCD0

text

#0C0E11

muted

#7D7E80

Preview Lab

Preview with #577B9B

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

Preview Lab → · Contrast checker → · Palette generator →