#577CEB#577CEB

#577CEB is a mid, vivid blue. Relative luminance 0.224; OKLCH L 61.5% C 0.172 H 267.3°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#577CEB
RGB	rgb(87, 124, 235)
HSL	hsl(225, 79%, 63%)
HSV	hsv(225, 63%, 92%)
CMYK	cmyk(63%, 47.2%, 0%, 7.8%)
CIE-LAB	lab(54.49, 21.28, -60.09)
CIE-LCH	lch(54.49, 63.74, 289.50°)
OKLab	oklab(61.53% -0.008 -0.1719)
OKLCH	oklch(61.53% 0.172 267.3)
XYZ	xyz(26.1284, 22.4374, 81.5351)
Luminance	0.2244 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#577CEB #EBC657

analogous

#57C6EB #577CEB #7C57EB

triadic

#577CEB #EB577C #7CEB57

tetradic

#577CEB #EB57C6 #EBC657 #57EB7C

square

#577CEB #EB57C6 #EBC657 #57EB7C

split-complementary

#577CEB #EB7C57 #C6EB57

monochromatic

#153DB2 #2051E4 #577CEB #8EA7F2 #C4D1F8

Accessibility & contrast

On white

3.83

#577CEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#577CEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #577CEB

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##577CEB	#FFFFFF	#000000	##000000
##577CEB	1.00	3.83	5.49	5.49
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4389EF

Deuteranopia (green-blind)

#267CE9

Tritanopia (blue-blind)

#0095A8

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #577ceb;
/* rgb */ color: rgb(87, 124, 235);
/* oklch */ color: oklch(61.5% 0.172 267.3);

Tailwind

colors: {
  custom: {
    50: '#94a1f2',
    500: '#577ceb',
    950: '#000000',
  },
}

SCSS

$custom: #577ceb;
$custom-light: #94a1f2;
$custom-dark: #000000;

JSON

{
  "hex": "#577ceb",
  "rgb": {
    "r": 87,
    "g": 124,
    "b": 235
  },
  "hsl": {
    "h": 225,
    "s": 78.723,
    "l": 63.137
  },
  "oklch": {
    "l": 0.61529,
    "c": 0.17212,
    "h": 267.3
  },
  "luminance": 0.2244
}

Semantic roles & 50–950 ramp

primary

#577CEB

secondary

#E9DCB4

accent

#A70ADB

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #577CEB

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

Preview Lab → · Contrast checker → · Palette generator →