#577FCC#577FCC

#577FCC is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.3% C 0.126 H 262.4°. Best body text is #000000 at 5.31:1 contrast (WCAG AA passes).

Color values

HEX	#577FCC
RGB	rgb(87, 127, 204)
HSL	hsl(219, 53%, 57%)
HSV	hsv(219, 57%, 80%)
CMYK	cmyk(57.4%, 37.7%, 0%, 20%)
CIE-LAB	lab(53.56, 9.09, -44.12)
CIE-LCH	lch(53.56, 45.05, 281.64°)
OKLab	oklab(60.25% -0.0166 -0.1251)
OKLCH	oklch(60.25% 0.126 262.4)
XYZ	xyz(22.4152, 21.5628, 60.0958)
Luminance	0.2157 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FCC #CCA457

analogous

#57BACC #577FCC #6A57CC

triadic

#577FCC #CC577F #7FCC57

tetradic

#577FCC #CC57BA #CCA457 #57CC6A

square

#577FCC #CC57BA #CCA457 #57CC6A

split-complementary

#577FCC #CC6A57 #BACC57

monochromatic

#274681 #365FB0 #577FCC #86A3DA #B5C7E9

Accessibility & contrast

On white

3.95

#577FCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.31

#577FCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FCC

5.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FCC	#FFFFFF	#000000	##000000
##577FCC	1.00	3.95	5.31	5.31
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.31	21.00	1.00	1.00
##000000	5.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F86CF

Deuteranopia (green-blind)

#507BCA

Tritanopia (blue-blind)

#00909C

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #577fcc;
/* rgb */ color: rgb(87, 127, 204);
/* oklch */ color: oklch(60.3% 0.126 262.4);

Tailwind

colors: {
  custom: {
    50: '#8fa3dc',
    500: '#577fcc',
    950: '#000000',
  },
}

SCSS

$custom: #577fcc;
$custom-light: #8fa3dc;
$custom-dark: #000000;

JSON

{
  "hex": "#577fcc",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 204
  },
  "hsl": {
    "h": 219.487,
    "s": 53.425,
    "l": 57.059
  },
  "oklch": {
    "l": 0.60252,
    "c": 0.12616,
    "h": 262.4
  },
  "luminance": 0.21565
}

Semantic roles & 50–950 ramp

primary

#577FCC

secondary

#D7C7A8

accent

#AB4BDD

background

#F9FAFD

surface

#F1F3FB

border

#CBCDD4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #577FCC

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

Preview Lab → · Contrast checker → · Palette generator →