#577BEA#577BEA

#577BEA is a mid, vivid blue. Relative luminance 0.221; OKLCH L 61.3% C 0.172 H 267.6°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#577BEA
RGB	rgb(87, 123, 234)
HSL	hsl(225, 78%, 63%)
HSV	hsv(225, 63%, 92%)
CMYK	cmyk(62.8%, 47.4%, 0%, 8.2%)
CIE-LAB	lab(54.17, 21.55, -60.05)
CIE-LCH	lch(54.17, 63.80, 289.75°)
OKLab	oklab(61.26% -0.0072 -0.1718)
OKLCH	oklch(61.26% 0.172 267.6)
XYZ	xyz(25.8596, 22.1304, 80.7348)
Luminance	0.2213 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577BEA #EAC657

analogous

#57C5EA #577BEA #7C57EA

triadic

#577BEA #EA577B #7BEA57

tetradic

#577BEA #EA57C5 #EAC657 #57EA7C

square

#577BEA #EA57C5 #EAC657 #57EA7C

split-complementary

#577BEA #EA7C57 #C5EA57

monochromatic

#163CB1 #2150E3 #577BEA #8DA6F1 #C4D0F8

Accessibility & contrast

On white

3.87

#577BEA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#577BEA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577BEA

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577BEA	#FFFFFF	#000000	##000000
##577BEA	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4289EE

Deuteranopia (green-blind)

#247BE8

Tritanopia (blue-blind)

#0095A7

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #577bea;
/* rgb */ color: rgb(87, 123, 234);
/* oklch */ color: oklch(61.3% 0.172 267.6);

Tailwind

colors: {
  custom: {
    50: '#94a0f1',
    500: '#577bea',
    950: '#000000',
  },
}

SCSS

$custom: #577bea;
$custom-light: #94a0f1;
$custom-dark: #000000;

JSON

{
  "hex": "#577bea",
  "rgb": {
    "r": 87,
    "g": 123,
    "b": 234
  },
  "hsl": {
    "h": 225.306,
    "s": 77.778,
    "l": 62.941
  },
  "oklch": {
    "l": 0.61263,
    "c": 0.17197,
    "h": 267.6
  },
  "luminance": 0.22133
}

Semantic roles & 50–950 ramp

primary

#577BEA

secondary

#E9DCB4

accent

#A70BDA

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #577BEA

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

Preview Lab → · Contrast checker → · Palette generator →