#3557BF#3557BF

#3557BF is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.3% C 0.168 H 266.5°. Best body text is #FFFFFF at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#3557BF
RGB	rgb(53, 87, 191)
HSL	hsl(225, 57%, 48%)
HSV	hsv(225, 72%, 75%)
CMYK	cmyk(72.3%, 54.5%, 0%, 25.1%)
CIE-LAB	lab(40.14, 23.82, -58.25)
CIE-LCH	lch(40.14, 62.93, 292.24°)
OKLab	oklab(49.27% -0.0102 -0.1677)
OKLCH	oklch(49.27% 0.168 266.5)
XYZ	xyz(14.2771, 11.3334, 50.7152)
Luminance	0.1134 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3557BF #BF9D35

analogous

#359CBF #3557BF #5835BF

triadic

#3557BF #BF3557 #57BF35

tetradic

#3557BF #BF359C #BF9D35 #35BF58

square

#3557BF #BF359C #BF9D35 #35BF58

split-complementary

#3557BF #BF5835 #9CBF35

monochromatic

#1A2B5F #28418F #3557BF #5F7BD3 #8FA3E0

Accessibility & contrast

On white

6.43

#3557BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3557BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3557BF

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3557BF	#FFFFFF	#000000	##FFFFFF
##3557BF	1.00	6.43	3.27	6.43
#FFFFFF	6.43	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065C3

Deuteranopia (green-blind)

#0059BD

Tritanopia (blue-blind)

#007082

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3557bf;
/* rgb */ color: rgb(53, 87, 191);
/* oklch */ color: oklch(49.3% 0.168 266.5);

Tailwind

colors: {
  custom: {
    50: '#7e85d3',
    500: '#3557bf',
    950: '#000000',
  },
}

SCSS

$custom: #3557bf;
$custom-light: #7e85d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3557bf",
  "rgb": {
    "r": 53,
    "g": 87,
    "b": 191
  },
  "hsl": {
    "h": 225.217,
    "s": 56.557,
    "l": 47.843
  },
  "oklch": {
    "l": 0.49267,
    "c": 0.16804,
    "h": 266.5
  },
  "luminance": 0.11335
}

Semantic roles & 50–950 ramp

primary

#3557BF

secondary

#CAB985

accent

#BA48E0

background

#F8F8FD

surface

#EFEFFA

border

#CACAD3

text

#0B0B14

muted

#7C7C83

Preview Lab

Preview with #3557BF

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

Preview Lab → · Contrast checker → · Palette generator →