#577BC8#577BC8

#577BC8 is a mid, vivid blue. Relative luminance 0.204; OKLCH L 59.2% C 0.125 H 264.0°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#577BC8
RGB	rgb(87, 123, 200)
HSL	hsl(221, 51%, 56%)
HSV	hsv(221, 57%, 78%)
CMYK	cmyk(56.5%, 38.5%, 0%, 21.6%)
CIE-LAB	lab(52.24, 10.20, -43.94)
CIE-LCH	lch(52.24, 45.10, 283.07°)
OKLab	oklab(59.16% -0.013 -0.1245)
OKLCH	oklch(59.16% 0.125 264)
XYZ	xyz(21.4352, 20.3606, 57.4328)
Luminance	0.2036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BC8 #C8A457

analogous

#57B4C8 #577BC8 #6C57C8

triadic

#577BC8 #C8577B #7BC857

tetradic

#577BC8 #C857B4 #C8A457 #57C86C

square

#577BC8 #C857B4 #C8A457 #57C86C

split-complementary

#577BC8 #C86C57 #B4C857

monochromatic

#29437C #385CAA #577BC8 #859FD7 #B3C3E6

Accessibility & contrast

On white

4.14

#577BC8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#577BC8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BC8

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BC8	#FFFFFF	#000000	##000000
##577BC8	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B82CB

Deuteranopia (green-blind)

#4D78C6

Tritanopia (blue-blind)

#048C98

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577bc8;
/* rgb */ color: rgb(87, 123, 200);
/* oklch */ color: oklch(59.2% 0.125 264.0);

Tailwind

colors: {
  custom: {
    50: '#8ea0d9',
    500: '#577bc8',
    950: '#000000',
  },
}

SCSS

$custom: #577bc8;
$custom-light: #8ea0d9;
$custom-dark: #000000;

JSON

{
  "hex": "#577bc8",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 200
  },
  "hsl": {
    "h": 220.885,
    "s": 50.673,
    "l": 56.275
  },
  "oklch": {
    "l": 0.59164,
    "c": 0.12523,
    "h": 264
  },
  "luminance": 0.20362
}

Semantic roles & 50–950 ramp

primary

#577BC8

secondary

#D5C6A6

accent

#AD4EDA

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0E14

muted

#7E7E83

Preview Lab

Preview with #577BC8

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

Preview Lab → · Contrast checker → · Palette generator →