#577BBA#577BBA

#577BBA is a mid, moderate blue. Relative luminance 0.197; OKLCH L 58.4% C 0.106 H 261.1°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#577BBA
RGB	rgb(87, 123, 186)
HSL	hsl(218, 42%, 54%)
HSV	hsv(218, 53%, 73%)
CMYK	cmyk(53.2%, 33.9%, 0%, 27.1%)
CIE-LAB	lab(51.54, 5.66, -37.04)
CIE-LCH	lch(51.54, 37.47, 278.69°)
OKLab	oklab(58.39% -0.0164 -0.1044)
OKLCH	oklch(58.39% 0.106 261.1)
XYZ	xyz(19.8734, 19.7358, 49.2070)
Luminance	0.1974 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BBA #BA9657

analogous

#57ACBA #577BBA #6457BA

triadic

#577BBA #BA577B #7BBA57

tetradic

#577BBA #BA57AC #BA9657 #57BA64

square

#577BBA #BA57AC #BA9657 #57BA64

split-complementary

#577BBA #BA6457 #ACBA57

monochromatic

#2C436B #3E5E96 #577BBA #829DCC #AEBFDE

Accessibility & contrast

On white

4.24

#577BBA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#577BBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BBA

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BBA	#FFFFFF	#000000	##000000
##577BBA	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6280BD

Deuteranopia (green-blind)

#5677B9

Tritanopia (blue-blind)

#238992

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #577bba;
/* rgb */ color: rgb(87, 123, 186);
/* oklch */ color: oklch(58.4% 0.106 261.1);

Tailwind

colors: {
  custom: {
    50: '#8da0cf',
    500: '#577bba',
    950: '#000000',
  },
}

SCSS

$custom: #577bba;
$custom-light: #8da0cf;
$custom-dark: #000000;

JSON

{
  "hex": "#577bba",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 186
  },
  "hsl": {
    "h": 218.182,
    "s": 41.772,
    "l": 53.529
  },
  "oklch": {
    "l": 0.58386,
    "c": 0.10571,
    "h": 261.1
  },
  "luminance": 0.19737
}

Semantic roles & 50–950 ramp

primary

#577BBA

secondary

#CCBCA1

accent

#A556D2

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #577BBA

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

Preview Lab → · Contrast checker → · Palette generator →