#577CC9#577CC9

#577CC9 is a mid, vivid blue. Relative luminance 0.207; OKLCH L 59.4% C 0.125 H 263.6°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#577CC9
RGB	rgb(87, 124, 201)
HSL	hsl(221, 51%, 56%)
HSV	hsv(221, 57%, 79%)
CMYK	cmyk(56.7%, 38.3%, 0%, 21.2%)
CIE-LAB	lab(52.57, 9.92, -43.98)
CIE-LCH	lch(52.57, 45.09, 282.71°)
OKLab	oklab(59.44% -0.0139 -0.1247)
OKLCH	oklch(59.44% 0.125 263.6)
XYZ	xyz(21.6772, 20.6569, 58.0919)
Luminance	0.2066 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CC9 #C9A457

analogous

#57B5C9 #577CC9 #6B57C9

triadic

#577CC9 #C9577C #7CC957

tetradic

#577CC9 #C957B5 #C9A457 #57C96B

square

#577CC9 #C957B5 #C9A457 #57C96B

split-complementary

#577CC9 #C96B57 #B5C957

monochromatic

#28447D #375DAC #577CC9 #85A0D8 #B4C4E7

Accessibility & contrast

On white

4.09

#577CC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#577CC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CC9

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CC9	#FFFFFF	#000000	##000000
##577CC9	1.00	4.09	5.13	5.13
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.13	21.00	1.00	1.00
##000000	5.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C83CC

Deuteranopia (green-blind)

#4E79C7

Tritanopia (blue-blind)

#008D99

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #577cc9;
/* rgb */ color: rgb(87, 124, 201);
/* oklch */ color: oklch(59.4% 0.125 263.6);

Tailwind

colors: {
  custom: {
    50: '#8fa1da',
    500: '#577cc9',
    950: '#000000',
  },
}

SCSS

$custom: #577cc9;
$custom-light: #8fa1da;
$custom-dark: #000000;

JSON

{
  "hex": "#577cc9",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 201
  },
  "hsl": {
    "h": 220.526,
    "s": 51.351,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59436,
    "c": 0.12546,
    "h": 263.6
  },
  "luminance": 0.20659
}

Semantic roles & 50–950 ramp

primary

#577CC9

secondary

#D5C6A7

accent

#AD4DDB

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #577CC9

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

Preview Lab → · Contrast checker → · Palette generator →