#577BC7#577BC7

#577BC7 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 59.1% C 0.124 H 263.8°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#577BC7
RGB	rgb(87, 123, 199)
HSL	hsl(221, 50%, 56%)
HSV	hsv(221, 56%, 78%)
CMYK	cmyk(56.3%, 38.2%, 0%, 22%)
CIE-LAB	lab(52.19, 9.87, -43.45)
CIE-LCH	lch(52.19, 44.56, 282.80°)
OKLab	oklab(59.11% -0.0133 -0.1231)
OKLCH	oklch(59.11% 0.124 263.8)
XYZ	xyz(21.3187, 20.3140, 56.8193)
Luminance	0.2032 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BC7 #C7A357

analogous

#57B3C7 #577BC7 #6B57C7

triadic

#577BC7 #C7577B #7BC757

tetradic

#577BC7 #C757B3 #C7A357 #57C76B

square

#577BC7 #C757B3 #C7A357 #57C76B

split-complementary

#577BC7 #C76B57 #B3C757

monochromatic

#29437B #385CA9 #577BC7 #859FD6 #B3C3E6

Accessibility & contrast

On white

4.15

#577BC7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#577BC7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BC7

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BC7	#FFFFFF	#000000	##000000
##577BC7	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C82CA

Deuteranopia (green-blind)

#4E78C5

Tritanopia (blue-blind)

#088C97

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #577bc7;
/* rgb */ color: rgb(87, 123, 199);
/* oklch */ color: oklch(59.1% 0.124 263.8);

Tailwind

colors: {
  custom: {
    50: '#8ea0d8',
    500: '#577bc7',
    950: '#000000',
  },
}

SCSS

$custom: #577bc7;
$custom-light: #8ea0d8;
$custom-dark: #000000;

JSON

{
  "hex": "#577bc7",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 199
  },
  "hsl": {
    "h": 220.714,
    "s": 50,
    "l": 56.078
  },
  "oklch": {
    "l": 0.59107,
    "c": 0.12383,
    "h": 263.8
  },
  "luminance": 0.20316
}

Semantic roles & 50–950 ramp

primary

#577BC7

secondary

#D4C5A6

accent

#AD4EDA

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0E14

muted

#7E7E83

Preview Lab

Preview with #577BC7

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

Preview Lab → · Contrast checker → · Palette generator →