#577AB9#577AB9

#577AB9 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 58.1% C 0.105 H 261.5°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#577AB9
RGB	rgb(87, 122, 185)
HSL	hsl(219, 41%, 53%)
HSV	hsv(219, 53%, 73%)
CMYK	cmyk(53%, 34.1%, 0%, 27.5%)
CIE-LAB	lab(51.21, 5.94, -36.98)
CIE-LCH	lch(51.21, 37.46, 279.13°)
OKLab	oklab(58.11% -0.0155 -0.1043)
OKLCH	oklch(58.11% 0.105 261.5)
XYZ	xyz(19.6440, 19.4466, 48.6080)
Luminance	0.1945 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577AB9 #B99657

analogous

#57ABB9 #577AB9 #6557B9

triadic

#577AB9 #B9577A #7AB957

tetradic

#577AB9 #B957AB #B99657 #57B965

square

#577AB9 #B957AB #B99657 #57B965

split-complementary

#577AB9 #B96557 #ABB957

monochromatic

#2C426A #3E5D95 #577AB9 #829CCB #ADBEDD

Accessibility & contrast

On white

4.29

#577AB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#577AB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577AB9

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577AB9	#FFFFFF	#000000	##000000
##577AB9	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617FBC

Deuteranopia (green-blind)

#5576B8

Tritanopia (blue-blind)

#248891

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577ab9;
/* rgb */ color: rgb(87, 122, 185);
/* oklch */ color: oklch(58.1% 0.105 261.5);

Tailwind

colors: {
  custom: {
    50: '#8da0ce',
    500: '#577ab9',
    950: '#000000',
  },
}

SCSS

$custom: #577ab9;
$custom-light: #8da0ce;
$custom-dark: #000000;

JSON

{
  "hex": "#577ab9",
  "rgb": {
    "r": 87,
    "g": 122,
    "b": 185
  },
  "hsl": {
    "h": 218.571,
    "s": 41.176,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58112,
    "c": 0.10542,
    "h": 261.5
  },
  "luminance": 0.19448
}

Semantic roles & 50–950 ramp

primary

#577AB9

secondary

#CBBCA1

accent

#A557D1

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577AB9

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

Preview Lab → · Contrast checker → · Palette generator →