#577BE3#577BE3

#577BE3 is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.8% C 0.162 H 267.1°. Best body text is #000000 at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#577BE3
RGB	rgb(87, 123, 227)
HSL	hsl(225, 71%, 62%)
HSV	hsv(225, 62%, 89%)
CMYK	cmyk(61.7%, 45.8%, 0%, 11%)
CIE-LAB	lab(53.75, 19.19, -56.80)
CIE-LCH	lch(53.75, 59.96, 288.67°)
OKLab	oklab(60.81% -0.0081 -0.1623)
OKLCH	oklch(60.81% 0.162 267.1)
XYZ	xyz(24.8738, 21.7360, 75.5428)
Luminance	0.2174 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BE3 #E3BF57

analogous

#57C1E3 #577BE3 #7957E3

triadic

#577BE3 #E3577B #7BE357

tetradic

#577BE3 #E357C1 #E3BF57 #57E379

square

#577BE3 #E357C1 #E3BF57 #57E379

split-complementary

#577BE3 #E37957 #C1E357

monochromatic

#1B3FA4 #2453D9 #577BE3 #8BA4EC #C0CDF4

Accessibility & contrast

On white

3.93

#577BE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.35

#577BE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BE3

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BE3	#FFFFFF	#000000	##000000
##577BE3	1.00	3.93	5.35	5.35
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.35	21.00	1.00	1.00
##000000	5.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4887E7

Deuteranopia (green-blind)

#317AE1

Tritanopia (blue-blind)

#0093A4

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #577be3;
/* rgb */ color: rgb(87, 123, 227);
/* oklch */ color: oklch(60.8% 0.162 267.1);

Tailwind

colors: {
  custom: {
    50: '#92a0ec',
    500: '#577be3',
    950: '#000000',
  },
}

SCSS

$custom: #577be3;
$custom-light: #92a0ec;
$custom-dark: #000000;

JSON

{
  "hex": "#577be3",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 227
  },
  "hsl": {
    "h": 224.571,
    "s": 71.429,
    "l": 61.569
  },
  "oklch": {
    "l": 0.60808,
    "c": 0.16249,
    "h": 267.1
  },
  "luminance": 0.21738
}

Semantic roles & 50–950 ramp

primary

#577BE3

secondary

#E5D8B1

accent

#A212D3

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #577BE3

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

Preview Lab → · Contrast checker → · Palette generator →