#577BB8#577BB8

#577BB8 is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.3% C 0.103 H 260.5°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#577BB8
RGB	rgb(87, 123, 184)
HSL	hsl(218, 41%, 53%)
HSV	hsv(218, 53%, 72%)
CMYK	cmyk(52.7%, 33.2%, 0%, 27.8%)
CIE-LAB	lab(51.44, 5.02, -36.04)
CIE-LCH	lch(51.44, 36.39, 277.93°)
OKLab	oklab(58.28% -0.017 -0.1015)
OKLCH	oklch(58.28% 0.103 260.5)
XYZ	xyz(19.6622, 19.6514, 48.0951)
Luminance	0.1965 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BB8 #B89457

analogous

#57ABB8 #577BB8 #6357B8

triadic

#577BB8 #B8577B #7BB857

tetradic

#577BB8 #B857AB #B89457 #57B863

square

#577BB8 #B857AB #B89457 #57B863

split-complementary

#577BB8 #B86357 #ABB857

monochromatic

#2C4368 #3E5E93 #577BB8 #829DCA #ADBFDC

Accessibility & contrast

On white

4.26

#577BB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#577BB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BB8

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BB8	#FFFFFF	#000000	##000000
##577BB8	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6380BB

Deuteranopia (green-blind)

#5776B7

Tritanopia (blue-blind)

#258891

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577bb8;
/* rgb */ color: rgb(87, 123, 184);
/* oklch */ color: oklch(58.3% 0.103 260.5);

Tailwind

colors: {
  custom: {
    50: '#8ca0cd',
    500: '#577bb8',
    950: '#000000',
  },
}

SCSS

$custom: #577bb8;
$custom-light: #8ca0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#577bb8",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 184
  },
  "hsl": {
    "h": 217.732,
    "s": 40.586,
    "l": 53.137
  },
  "oklch": {
    "l": 0.5828,
    "c": 0.10293,
    "h": 260.5
  },
  "luminance": 0.19653
}

Semantic roles & 50–950 ramp

primary

#577BB8

secondary

#CABBA0

accent

#A457D0

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0D0E13

muted

#7D7E82

Preview Lab

Preview with #577BB8

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

Preview Lab → · Contrast checker → · Palette generator →