#577BCA#577BCA

#577BCA is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.3% C 0.128 H 264.3°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#577BCA
RGB	rgb(87, 123, 202)
HSL	hsl(221, 52%, 57%)
HSV	hsv(221, 57%, 79%)
CMYK	cmyk(56.9%, 39.1%, 0%, 20.8%)
CIE-LAB	lab(52.35, 10.85, -44.91)
CIE-LCH	lch(52.35, 46.20, 283.59°)
OKLab	oklab(59.28% -0.0126 -0.1274)
OKLCH	oklch(59.28% 0.128 264.3)
XYZ	xyz(21.6705, 20.4547, 58.6718)
Luminance	0.2046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BCA #CAA657

analogous

#57B5CA #577BCA #6D57CA

triadic

#577BCA #CA577B #7BCA57

tetradic

#577BCA #CA57B5 #CAA657 #57CA6D

square

#577BCA #CA57B5 #CAA657 #57CA6D

split-complementary

#577BCA #CA6D57 #B5CA57

monochromatic

#28437F #375CAD #577BCA #86A0D9 #B4C4E7

Accessibility & contrast

On white

4.12

#577BCA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#577BCA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BCA

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BCA	#FFFFFF	#000000	##000000
##577BCA	1.00	4.12	5.09	5.09
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A83CD

Deuteranopia (green-blind)

#4B78C8

Tritanopia (blue-blind)

#008C99

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577bca;
/* rgb */ color: rgb(87, 123, 202);
/* oklch */ color: oklch(59.3% 0.128 264.3);

Tailwind

colors: {
  custom: {
    50: '#8fa0da',
    500: '#577bca',
    950: '#000000',
  },
}

SCSS

$custom: #577bca;
$custom-light: #8fa0da;
$custom-dark: #000000;

JSON

{
  "hex": "#577bca",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 202
  },
  "hsl": {
    "h": 221.217,
    "s": 52.036,
    "l": 56.667
  },
  "oklch": {
    "l": 0.5928,
    "c": 0.12801,
    "h": 264.3
  },
  "luminance": 0.20456
}

Semantic roles & 50–950 ramp

primary

#577BCA

secondary

#D6C7A7

accent

#AF4CDB

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577BCA

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

Preview Lab → · Contrast checker → · Palette generator →