#577B91#577B91

#577B91 is a mid, muted cyan. Relative luminance 0.182; OKLCH L 56.4% C 0.053 H 235.8°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#577B91
RGB	rgb(87, 123, 145)
HSL	hsl(203, 25%, 45%)
HSV	hsv(203, 40%, 57%)
CMYK	cmyk(40%, 15.2%, 0%, 43.1%)
CIE-LAB	lab(49.78, -6.76, -15.93)
CIE-LCH	lch(49.78, 17.30, 247.02°)
OKLab	oklab(56.43% -0.0298 -0.0439)
OKLCH	oklch(56.43% 0.053 235.8)
XYZ	xyz(16.1226, 18.2355, 29.4528)
Luminance	0.1824 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577B91 #916D57

analogous

#57918A #577B91 #575E91

triadic

#577B91 #91577B #7B9157

tetradic

#577B91 #8A5791 #916D57 #5E9157

square

#577B91 #8A5791 #916D57 #5E9157

split-complementary

#577B91 #91575E #918A57

monochromatic

#293A44 #405B6B #577B91 #7799AE #9EB6C5

Accessibility & contrast

On white

4.52

#577B91 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#577B91 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577B91

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577B91	#FFFFFF	#000000	##000000
##577B91	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#717A92

Deuteranopia (green-blind)

#697491

Tritanopia (blue-blind)

#428182

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #577b91;
/* rgb */ color: rgb(87, 123, 145);
/* oklch */ color: oklch(56.4% 0.053 235.8);

Tailwind

colors: {
  custom: {
    50: '#89a1b1',
    500: '#577b91',
    950: '#000000',
  },
}

SCSS

$custom: #577b91;
$custom-light: #89a1b1;
$custom-dark: #000000;

JSON

{
  "hex": "#577b91",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 145
  },
  "hsl": {
    "h": 202.759,
    "s": 25,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56429,
    "c": 0.0531,
    "h": 235.8
  },
  "luminance": 0.18236
}

Semantic roles & 50–950 ramp

primary

#577B91

secondary

#B29E92

accent

#8966C1

background

#F8F9FA

surface

#F0F2F5

border

#CBCCCF

text

#0C0E10

muted

#7D7E7F

Preview Lab

Preview with #577B91

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

Preview Lab → · Contrast checker → · Palette generator →