#577BB9#577BB9

#577BB9 is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.3% C 0.104 H 260.8°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#577BB9
RGB	rgb(87, 123, 185)
HSL	hsl(218, 41%, 53%)
HSV	hsv(218, 53%, 73%)
CMYK	cmyk(53%, 33.5%, 0%, 27.5%)
CIE-LAB	lab(51.49, 5.34, -36.54)
CIE-LCH	lch(51.49, 36.93, 278.31°)
OKLab	oklab(58.33% -0.0167 -0.103)
OKLCH	oklch(58.33% 0.104 260.8)
XYZ	xyz(19.7674, 19.6935, 48.6491)
Luminance	0.1969 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB9 #B99557

analogous

#57ACB9 #577BB9 #6457B9

triadic

#577BB9 #B9577B #7BB957

tetradic

#577BB9 #B957AC #B99557 #57B964

square

#577BB9 #B957AC #B99557 #57B964

split-complementary

#577BB9 #B96457 #ACB957

monochromatic

#2C436A #3E5E95 #577BB9 #829DCB #ADBFDD

Accessibility & contrast

On white

4.25

#577BB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#577BB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB9

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB9	#FFFFFF	#000000	##000000
##577BB9	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6380BC

Deuteranopia (green-blind)

#5777B8

Tritanopia (blue-blind)

#248991

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577bb9;
/* rgb */ color: rgb(87, 123, 185);
/* oklch */ color: oklch(58.3% 0.104 260.8);

Tailwind

colors: {
  custom: {
    50: '#8da0ce',
    500: '#577bb9',
    950: '#000000',
  },
}

SCSS

$custom: #577bb9;
$custom-light: #8da0ce;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb9",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 185
  },
  "hsl": {
    "h": 217.959,
    "s": 41.176,
    "l": 53.333
  },
  "oklch": {
    "l": 0.58333,
    "c": 0.10432,
    "h": 260.8
  },
  "luminance": 0.19695
}

Semantic roles & 50–950 ramp

primary

#577BB9

secondary

#CBBBA1

accent

#A457D1

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577BB9

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

Preview Lab → · Contrast checker → · Palette generator →