#577BBC#577BBC

#577BBC is a mid, moderate blue. Relative luminance 0.198; OKLCH L 58.5% C 0.108 H 261.6°. Best body text is #000000 at 4.96:1 contrast (WCAG AA passes).

Color values

HEX	#577BBC
RGB	rgb(87, 123, 188)
HSL	hsl(219, 43%, 54%)
HSV	hsv(219, 54%, 74%)
CMYK	cmyk(53.7%, 34.6%, 0%, 26.3%)
CIE-LAB	lab(51.63, 6.30, -38.03)
CIE-LCH	lch(51.63, 38.55, 279.40°)
OKLab	oklab(58.49% -0.0159 -0.1073)
OKLCH	oklch(58.49% 0.108 261.6)
XYZ	xyz(20.0875, 19.8215, 50.3346)
Luminance	0.1982 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BBC #BC9857

analogous

#57AEBC #577BBC #6657BC

triadic

#577BBC #BC577B #7BBC57

tetradic

#577BBC #BC57AE #BC9857 #57BC66

square

#577BBC #BC57AE #BC9857 #57BC66

split-complementary

#577BBC #BC6657 #AEBC57

monochromatic

#2C436D #3D5E99 #577BBC #839DCD #AFC0DF

Accessibility & contrast

On white

4.23

#577BBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.96

#577BBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BBC

4.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BBC	#FFFFFF	#000000	##000000
##577BBC	1.00	4.23	4.96	4.96
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.96	21.00	1.00	1.00
##000000	4.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6180BF

Deuteranopia (green-blind)

#5577BB

Tritanopia (blue-blind)

#208993

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577bbc;
/* rgb */ color: rgb(87, 123, 188);
/* oklch */ color: oklch(58.5% 0.108 261.6);

Tailwind

colors: {
  custom: {
    50: '#8da0d0',
    500: '#577bbc',
    950: '#000000',
  },
}

SCSS

$custom: #577bbc;
$custom-light: #8da0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#577bbc",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 188
  },
  "hsl": {
    "h": 218.614,
    "s": 42.979,
    "l": 53.922
  },
  "oklch": {
    "l": 0.58494,
    "c": 0.10849,
    "h": 261.6
  },
  "luminance": 0.19823
}

Semantic roles & 50–950 ramp

primary

#577BBC

secondary

#CDBEA2

accent

#A655D3

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #577BBC

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

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