#557BF0#557BF0

#557BF0 is a mid, vivid blue. Relative luminance 0.224; OKLCH L 61.6% C 0.181 H 267.4°. Best body text is #000000 at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#557BF0
RGB	rgb(85, 123, 240)
HSL	hsl(225, 84%, 64%)
HSV	hsv(225, 65%, 94%)
CMYK	cmyk(64.6%, 48.7%, 0%, 5.9%)
CIE-LAB	lab(54.43, 23.26, -62.96)
CIE-LCH	lch(54.43, 67.12, 290.28°)
OKLab	oklab(61.56% -0.0083 -0.1804)
OKLCH	oklch(61.56% 0.181 267.4)
XYZ	xyz(26.5520, 22.3860, 85.3428)
Luminance	0.2239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BF0 #F0CA55

analogous

#55C9F0 #557BF0 #7C55F0

triadic

#557BF0 #F0557B #7BF055

tetradic

#557BF0 #F055C9 #F0CA55 #55F07C

square

#557BF0 #F055C9 #F0CA55 #55F07C

split-complementary

#557BF0 #F07C55 #C9F055

monochromatic

#103ABA #1D4FEB #557BF0 #8DA7F5 #C5D2FA

Accessibility & contrast

On white

3.83

#557BF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.48

#557BF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BF0

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BF0	#FFFFFF	#000000	##000000
##557BF0	1.00	3.83	5.48	5.48
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.48	21.00	1.00	1.00
##000000	5.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B8AF4

Deuteranopia (green-blind)

#107CEE

Tritanopia (blue-blind)

#0096AA

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #557bf0;
/* rgb */ color: rgb(85, 123, 240);
/* oklch */ color: oklch(61.6% 0.181 267.4);

Tailwind

colors: {
  custom: {
    50: '#94a0f6',
    500: '#557bf0',
    950: '#000000',
  },
}

SCSS

$custom: #557bf0;
$custom-light: #94a0f6;
$custom-dark: #000000;

JSON

{
  "hex": "#557bf0",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 240
  },
  "hsl": {
    "h": 225.29,
    "s": 83.784,
    "l": 63.725
  },
  "oklch": {
    "l": 0.61559,
    "c": 0.18063,
    "h": 267.4
  },
  "luminance": 0.22388
}

Semantic roles & 50–950 ramp

primary

#557BF0

secondary

#ECDEB5

accent

#AB05E0

background

#F9F9FF

surface

#F2F2FE

border

#CCCCD6

text

#0E0E17

muted

#7E7E85

Preview Lab

Preview with #557BF0

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

Preview Lab → · Contrast checker → · Palette generator →