#577DC9#577DC9

#577DC9 is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.7% C 0.124 H 263.0°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#577DC9
RGB	rgb(87, 125, 201)
HSL	hsl(220, 51%, 56%)
HSV	hsv(220, 57%, 79%)
CMYK	cmyk(56.7%, 37.8%, 0%, 21.2%)
CIE-LAB	lab(52.85, 9.31, -43.54)
CIE-LCH	lch(52.85, 44.53, 282.07°)
OKLab	oklab(59.65% -0.0151 -0.1234)
OKLCH	oklch(59.65% 0.124 263)
XYZ	xyz(21.8031, 20.9088, 58.1339)
Luminance	0.2091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DC9 #C9A357

analogous

#57B6C9 #577DC9 #6A57C9

triadic

#577DC9 #C9577D #7DC957

tetradic

#577DC9 #C957B6 #C9A357 #57C96A

square

#577DC9 #C957B6 #C9A357 #57C96A

split-complementary

#577DC9 #C96A57 #B6C957

monochromatic

#28457D #375EAC #577DC9 #85A1D8 #B4C5E7

Accessibility & contrast

On white

4.05

#577DC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#577DC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DC9

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DC9	#FFFFFF	#000000	##000000
##577DC9	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E84CC

Deuteranopia (green-blind)

#4F79C7

Tritanopia (blue-blind)

#008E99

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #577dc9;
/* rgb */ color: rgb(87, 125, 201);
/* oklch */ color: oklch(59.7% 0.124 263.0);

Tailwind

colors: {
  custom: {
    50: '#8fa2da',
    500: '#577dc9',
    950: '#000000',
  },
}

SCSS

$custom: #577dc9;
$custom-light: #8fa2da;
$custom-dark: #000000;

JSON

{
  "hex": "#577dc9",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 201
  },
  "hsl": {
    "h": 220,
    "s": 51.351,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59651,
    "c": 0.1243,
    "h": 263
  },
  "luminance": 0.20911
}

Semantic roles & 50–950 ramp

primary

#577DC9

secondary

#D5C6A7

accent

#AC4DDB

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #577DC9

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

Preview Lab → · Contrast checker → · Palette generator →