#577BB0#577BB0

#577BB0 is a mid, moderate blue. Relative luminance 0.193; OKLCH L 57.9% C 0.092 H 257.9°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#577BB0
RGB	rgb(87, 123, 176)
HSL	hsl(216, 36%, 52%)
HSV	hsv(216, 51%, 69%)
CMYK	cmyk(50.6%, 30.1%, 0%, 31%)
CIE-LAB	lab(51.07, 2.49, -32.01)
CIE-LCH	lch(51.07, 32.11, 274.45°)
OKLab	oklab(57.86% -0.0192 -0.0898)
OKLCH	oklch(57.86% 0.092 257.9)
XYZ	xyz(18.8473, 19.3254, 43.8029)
Luminance	0.1933 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB0 #B08C57

analogous

#57A8B0 #577BB0 #6057B0

triadic

#577BB0 #B0577B #7BB057

tetradic

#577BB0 #B057A8 #B08C57 #57B060

square

#577BB0 #B057A8 #B08C57 #57B060

split-complementary

#577BB0 #B06057 #A8B057

monochromatic

#2D4160 #415E89 #577BB0 #819CC4 #AABCD7

Accessibility & contrast

On white

4.32

#577BB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#577BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB0

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB0	#FFFFFF	#000000	##000000
##577BB0	1.00	4.32	4.87	4.87
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667EB2

Deuteranopia (green-blind)

#5C76AF

Tritanopia (blue-blind)

#2E878E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #577bb0;
/* rgb */ color: rgb(87, 123, 176);
/* oklch */ color: oklch(57.9% 0.092 257.9);

Tailwind

colors: {
  custom: {
    50: '#8ca1c8',
    500: '#577bb0',
    950: '#000000',
  },
}

SCSS

$custom: #577bb0;
$custom-light: #8ca1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb0",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 215.73,
    "s": 36.032,
    "l": 51.569
  },
  "oklch": {
    "l": 0.57864,
    "c": 0.09188,
    "h": 257.9
  },
  "luminance": 0.19327
}

Semantic roles & 50–950 ramp

primary

#577BB0

secondary

#C5B59E

accent

#9F5CCC

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #577BB0

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

Preview Lab → · Contrast checker → · Palette generator →