#577BE9#577BE9

#577BE9 is a mid, vivid blue. Relative luminance 0.221; OKLCH L 61.2% C 0.171 H 267.6°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#577BE9
RGB	rgb(87, 123, 233)
HSL	hsl(225, 77%, 63%)
HSV	hsv(225, 63%, 91%)
CMYK	cmyk(62.7%, 47.2%, 0%, 8.6%)
CIE-LAB	lab(54.10, 21.22, -59.59)
CIE-LCH	lch(54.10, 63.25, 289.60°)
OKLab	oklab(61.2% -0.0073 -0.1705)
OKLCH	oklch(61.2% 0.171 267.6)
XYZ	xyz(25.7164, 22.0731, 79.9803)
Luminance	0.2208 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BE9 #E9C557

analogous

#57C4E9 #577BE9 #7C57E9

triadic

#577BE9 #E9577B #7BE957

tetradic

#577BE9 #E957C4 #E9C557 #57E97C

square

#577BE9 #E957C4 #E9C557 #57E97C

split-complementary

#577BE9 #E97C57 #C4E957

monochromatic

#173CAF #2150E2 #577BE9 #8DA6F0 #C3D0F7

Accessibility & contrast

On white

3.88

#577BE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#577BE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BE9

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BE9	#FFFFFF	#000000	##000000
##577BE9	1.00	3.88	5.41	5.41
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4388ED

Deuteranopia (green-blind)

#267BE7

Tritanopia (blue-blind)

#0094A7

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577be9;
/* rgb */ color: rgb(87, 123, 233);
/* oklch */ color: oklch(61.2% 0.171 267.6);

Tailwind

colors: {
  custom: {
    50: '#93a0f1',
    500: '#577be9',
    950: '#000000',
  },
}

SCSS

$custom: #577be9;
$custom-light: #93a0f1;
$custom-dark: #000000;

JSON

{
  "hex": "#577be9",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 233
  },
  "hsl": {
    "h": 225.205,
    "s": 76.842,
    "l": 62.745
  },
  "oklch": {
    "l": 0.61197,
    "c": 0.17063,
    "h": 267.6
  },
  "luminance": 0.22075
}

Semantic roles & 50–950 ramp

primary

#577BE9

secondary

#E8DBB3

accent

#A70CD9

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #577BE9

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

Preview Lab → · Contrast checker → · Palette generator →