#577BCC#577BCC

#577BCC is a mid, vivid blue. Relative luminance 0.206; OKLCH L 59.4% C 0.131 H 264.7°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#577BCC
RGB	rgb(87, 123, 204)
HSL	hsl(222, 53%, 57%)
HSV	hsv(222, 57%, 80%)
CMYK	cmyk(57.4%, 39.7%, 0%, 20%)
CIE-LAB	lab(52.45, 11.51, -45.88)
CIE-LCH	lch(52.45, 47.30, 284.09°)
OKLab	oklab(59.4% -0.0122 -0.1302)
OKLCH	oklch(59.4% 0.131 264.7)
XYZ	xyz(21.9088, 20.5500, 59.9271)
Luminance	0.2055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BCC #CCA857

analogous

#57B6CC #577BCC #6D57CC

triadic

#577BCC #CC577B #7BCC57

tetradic

#577BCC #CC57B6 #CCA857 #57CC6D

square

#577BCC #CC57B6 #CCA857 #57CC6D

split-complementary

#577BCC #CC6D57 #B6CC57

monochromatic

#274381 #365BB0 #577BCC #86A0DA #B5C5E9

Accessibility & contrast

On white

4.11

#577BCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#577BCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BCC

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BCC	#FFFFFF	#000000	##000000
##577BCC	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5983CF

Deuteranopia (green-blind)

#4A78CA

Tritanopia (blue-blind)

#008D9A

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577bcc;
/* rgb */ color: rgb(87, 123, 204);
/* oklch */ color: oklch(59.4% 0.131 264.7);

Tailwind

colors: {
  custom: {
    50: '#8fa0dc',
    500: '#577bcc',
    950: '#000000',
  },
}

SCSS

$custom: #577bcc;
$custom-light: #8fa0dc;
$custom-dark: #000000;

JSON

{
  "hex": "#577bcc",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 204
  },
  "hsl": {
    "h": 221.538,
    "s": 53.425,
    "l": 57.059
  },
  "oklch": {
    "l": 0.59396,
    "c": 0.1308,
    "h": 264.7
  },
  "luminance": 0.20552
}

Semantic roles & 50–950 ramp

primary

#577BCC

secondary

#D7C9A8

accent

#B04BDD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577BCC

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

Preview Lab → · Contrast checker → · Palette generator →