#577FE3#577FE3

#577FE3 is a mid, vivid blue. Relative luminance 0.228; OKLCH L 61.6% C 0.158 H 265.6°. Best body text is #000000 at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#577FE3
RGB	rgb(87, 127, 227)
HSL	hsl(223, 71%, 62%)
HSV	hsv(223, 62%, 89%)
CMYK	cmyk(61.7%, 44.1%, 0%, 11%)
CIE-LAB	lab(54.81, 16.75, -55.10)
CIE-LCH	lch(54.81, 57.59, 286.91°)
OKLab	oklab(61.63% -0.0121 -0.1572)
OKLCH	oklch(61.63% 0.158 265.6)
XYZ	xyz(25.3802, 22.7488, 75.7116)
Luminance	0.2275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577FE3 #E3BB57

analogous

#57C5E3 #577FE3 #7557E3

triadic

#577FE3 #E3577F #7FE357

tetradic

#577FE3 #E357C5 #E3BB57 #57E375

square

#577FE3 #E357C5 #E3BB57 #57E375

split-complementary

#577FE3 #E37557 #C5E357

monochromatic

#1B42A4 #2458D9 #577FE3 #8BA7EC #C0CFF4

Accessibility & contrast

On white

3.78

#577FE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.55

#577FE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577FE3

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577FE3	#FFFFFF	#000000	##000000
##577FE3	1.00	3.78	5.55	5.55
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.55	21.00	1.00	1.00
##000000	5.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#508AE7

Deuteranopia (green-blind)

#3A7DE1

Tritanopia (blue-blind)

#0096A6

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #577fe3;
/* rgb */ color: rgb(87, 127, 227);
/* oklch */ color: oklch(61.6% 0.158 265.6);

Tailwind

colors: {
  custom: {
    50: '#92a3ec',
    500: '#577fe3',
    950: '#000000',
  },
}

SCSS

$custom: #577fe3;
$custom-light: #92a3ec;
$custom-dark: #000000;

JSON

{
  "hex": "#577fe3",
  "rgb": {
    "r": 87,
    "g": 127,
    "b": 227
  },
  "hsl": {
    "h": 222.857,
    "s": 71.429,
    "l": 61.569
  },
  "oklch": {
    "l": 0.61625,
    "c": 0.15768,
    "h": 265.6
  },
  "luminance": 0.22751
}

Semantic roles & 50–950 ramp

primary

#577FE3

secondary

#E5D6B1

accent

#9C12D3

background

#F9FAFE

surface

#F2F3FD

border

#CCCDD5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #577FE3

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

Preview Lab → · Contrast checker → · Palette generator →