#577BC5#577BC5

#577BC5 is a mid, vivid blue. Relative luminance 0.202; OKLCH L 59.0% C 0.121 H 263.5°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#577BC5
RGB	rgb(87, 123, 197)
HSL	hsl(220, 49%, 56%)
HSV	hsv(220, 56%, 77%)
CMYK	cmyk(55.8%, 37.6%, 0%, 22.7%)
CIE-LAB	lab(52.09, 9.22, -42.47)
CIE-LCH	lch(52.09, 43.46, 282.24°)
OKLab	oklab(58.99% -0.0137 -0.1203)
OKLCH	oklch(58.99% 0.121 263.5)
XYZ	xyz(21.0881, 20.2217, 55.6044)
Luminance	0.2022 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BC5 #C5A157

analogous

#57B2C5 #577BC5 #6A57C5

triadic

#577BC5 #C5577B #7BC557

tetradic

#577BC5 #C557B2 #C5A157 #57C56A

square

#577BC5 #C557B2 #C5A157 #57C56A

split-complementary

#577BC5 #C56A57 #B2C557

monochromatic

#294378 #395DA6 #577BC5 #849FD5 #B2C2E4

Accessibility & contrast

On white

4.16

#577BC5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#577BC5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BC5

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BC5	#FFFFFF	#000000	##000000
##577BC5	1.00	4.16	5.04	5.04
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D82C8

Deuteranopia (green-blind)

#4F78C3

Tritanopia (blue-blind)

#0F8B96

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577bc5;
/* rgb */ color: rgb(87, 123, 197);
/* oklch */ color: oklch(59.0% 0.121 263.5);

Tailwind

colors: {
  custom: {
    50: '#8ea0d7',
    500: '#577bc5',
    950: '#000000',
  },
}

SCSS

$custom: #577bc5;
$custom-light: #8ea0d7;
$custom-dark: #000000;

JSON

{
  "hex": "#577bc5",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 197
  },
  "hsl": {
    "h": 220.364,
    "s": 48.673,
    "l": 55.686
  },
  "oklch": {
    "l": 0.58993,
    "c": 0.12104,
    "h": 263.5
  },
  "luminance": 0.20223
}

Semantic roles & 50–950 ramp

primary

#577BC5

secondary

#D3C4A5

accent

#AC50D8

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0E14

muted

#7E7E83

Preview Lab

Preview with #577BC5

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

Preview Lab → · Contrast checker → · Palette generator →