#577DEF#577DEF

#577DEF is a mid, vivid blue. Relative luminance 0.229; OKLCH L 62.0% C 0.176 H 267.3°. Best body text is #000000 at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#577DEF
RGB	rgb(87, 125, 239)
HSL	hsl(225, 83%, 64%)
HSV	hsv(225, 64%, 94%)
CMYK	cmyk(63.6%, 47.7%, 0%, 6.3%)
CIE-LAB	lab(54.99, 22.02, -61.50)
CIE-LCH	lch(54.99, 65.33, 289.70°)
OKLab	oklab(61.99% -0.0084 -0.1761)
OKLCH	oklch(61.99% 0.176 267.3)
XYZ	xyz(26.8387, 22.9230, 84.6548)
Luminance	0.2293 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577DEF #EFC957

analogous

#57C9EF #577DEF #7D57EF

triadic

#577DEF #EF577D #7DEF57

tetradic

#577DEF #EF57C9 #EFC957 #57EF7D

square

#577DEF #EF57C9 #EFC957 #57EF7D

split-complementary

#577DEF #EF7D57 #C9EF57

monochromatic

#123CBA #1F52EA #577DEF #8FA8F4 #C7D3FA

Accessibility & contrast

On white

3.76

#577DEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.59

#577DEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577DEF

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577DEF	#FFFFFF	#000000	##000000
##577DEF	1.00	3.76	5.59	5.59
#FFFFFF	3.76	1.00	21.00	21.00
#000000	5.59	21.00	1.00	1.00
##000000	5.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#418BF3

Deuteranopia (green-blind)

#207DED

Tritanopia (blue-blind)

#0097AA

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #577def;
/* rgb */ color: rgb(87, 125, 239);
/* oklch */ color: oklch(62.0% 0.176 267.3);

Tailwind

colors: {
  custom: {
    50: '#94a2f5',
    500: '#577def',
    950: '#000000',
  },
}

SCSS

$custom: #577def;
$custom-light: #94a2f5;
$custom-dark: #000000;

JSON

{
  "hex": "#577def",
  "rgb": {
    "r": 87,
    "g": 125,
    "b": 239
  },
  "hsl": {
    "h": 225,
    "s": 82.609,
    "l": 63.922
  },
  "oklch": {
    "l": 0.61992,
    "c": 0.17628,
    "h": 267.3
  },
  "luminance": 0.22925
}

Semantic roles & 50–950 ramp

primary

#577DEF

secondary

#ECDEB6

accent

#A906DF

background

#F9F9FF

surface

#F2F2FE

border

#CCCCD6

text

#0E0F17

muted

#7E7E85

Preview Lab

Preview with #577DEF

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

Preview Lab → · Contrast checker → · Palette generator →