#577DCC#577DCC

#577DCC is a mid, vivid blue. Relative luminance 0.211; OKLCH L 59.8% C 0.128 H 263.6°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#577DCC
RGB	rgb(87, 125, 204)
HSL	hsl(221, 53%, 57%)
HSV	hsv(221, 57%, 80%)
CMYK	cmyk(57.4%, 38.7%, 0%, 20%)
CIE-LAB	lab(53.01, 10.30, -45.00)
CIE-LCH	lch(53.01, 46.17, 282.89°)
OKLab	oklab(59.82% -0.0144 -0.1277)
OKLCH	oklch(59.82% 0.128 263.6)
XYZ	xyz(22.1595, 21.0513, 60.0106)
Luminance	0.2105 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DCC #CCA657

analogous

#57B8CC #577DCC #6C57CC

triadic

#577DCC #CC577D #7DCC57

tetradic

#577DCC #CC57B8 #CCA657 #57CC6C

square

#577DCC #CC57B8 #CCA657 #57CC6C

split-complementary

#577DCC #CC6C57 #B8CC57

monochromatic

#274581 #365DB0 #577DCC #86A1DA #B5C6E9

Accessibility & contrast

On white

4.03

#577DCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#577DCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DCC

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DCC	#FFFFFF	#000000	##000000
##577DCC	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C84CF

Deuteranopia (green-blind)

#4D7ACA

Tritanopia (blue-blind)

#008E9B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #577dcc;
/* rgb */ color: rgb(87, 125, 204);
/* oklch */ color: oklch(59.8% 0.128 263.6);

Tailwind

colors: {
  custom: {
    50: '#8fa2dc',
    500: '#577dcc',
    950: '#000000',
  },
}

SCSS

$custom: #577dcc;
$custom-light: #8fa2dc;
$custom-dark: #000000;

JSON

{
  "hex": "#577dcc",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 204
  },
  "hsl": {
    "h": 220.513,
    "s": 53.425,
    "l": 57.059
  },
  "oklch": {
    "l": 0.59823,
    "c": 0.12846,
    "h": 263.6
  },
  "luminance": 0.21053
}

Semantic roles & 50–950 ramp

primary

#577DCC

secondary

#D7C8A8

accent

#AD4BDD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577DCC

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

Preview Lab → · Contrast checker → · Palette generator →