#577CEF#577CEF

#577CEF is a mid, vivid blue. Relative luminance 0.227; OKLCH L 61.8% C 0.177 H 267.6°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#577CEF
RGB	rgb(87, 124, 239)
HSL	hsl(225, 83%, 64%)
HSV	hsv(225, 64%, 94%)
CMYK	cmyk(63.6%, 48.1%, 0%, 6.3%)
CIE-LAB	lab(54.73, 22.64, -61.92)
CIE-LCH	lch(54.73, 65.93, 290.08°)
OKLab	oklab(61.79% -0.0075 -0.1773)
OKLCH	oklch(61.79% 0.177 267.6)
XYZ	xyz(26.7128, 22.6711, 84.6128)
Luminance	0.2267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CEF #EFCA57

analogous

#57C8EF #577CEF #7E57EF

triadic

#577CEF #EF577C #7CEF57

tetradic

#577CEF #EF57C8 #EFCA57 #57EF7E

square

#577CEF #EF57C8 #EFCA57 #57EF7E

split-complementary

#577CEF #EF7E57 #C8EF57

monochromatic

#123BBA #1F50EA #577CEF #8FA8F4 #C7D3FA

Accessibility & contrast

On white

3.79

#577CEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#577CEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CEF

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CEF	#FFFFFF	#000000	##000000
##577CEF	1.00	3.79	5.53	5.53
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F8AF3

Deuteranopia (green-blind)

#1C7CED

Tritanopia (blue-blind)

#0097AA

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #577cef;
/* rgb */ color: rgb(87, 124, 239);
/* oklch */ color: oklch(61.8% 0.177 267.6);

Tailwind

colors: {
  custom: {
    50: '#94a1f5',
    500: '#577cef',
    950: '#000000',
  },
}

SCSS

$custom: #577cef;
$custom-light: #94a1f5;
$custom-dark: #000000;

JSON

{
  "hex": "#577cef",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 239
  },
  "hsl": {
    "h": 225.395,
    "s": 82.609,
    "l": 63.922
  },
  "oklch": {
    "l": 0.61793,
    "c": 0.17749,
    "h": 267.6
  },
  "luminance": 0.22674
}

Semantic roles & 50–950 ramp

primary

#577CEF

secondary

#ECDFB6

accent

#AA06DF

background

#F9F9FF

surface

#F2F2FE

border

#CCCCD6

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #577CEF

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

Preview Lab → · Contrast checker → · Palette generator →