#3555B7#3555B7

#3555B7 is a mid, vivid blue. Relative luminance 0.107; OKLCH L 48.2% C 0.160 H 266.7°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#3555B7
RGB	rgb(53, 85, 183)
HSL	hsl(225, 55%, 46%)
HSV	hsv(225, 71%, 72%)
CMYK	cmyk(71%, 53.6%, 0%, 28.2%)
CIE-LAB	lab(39.02, 22.17, -55.37)
CIE-LCH	lch(39.02, 59.64, 291.82°)
OKLab	oklab(48.24% -0.0092 -0.1593)
OKLCH	oklch(48.24% 0.16 266.7)
XYZ	xyz(13.2610, 10.6714, 46.1515)
Luminance	0.1067 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3555B7 #B79735

analogous

#3596B7 #3555B7 #5635B7

triadic

#3555B7 #B73555 #55B735

tetradic

#3555B7 #B73596 #B79735 #35B756

square

#3555B7 #B73596 #B79735 #35B756

split-complementary

#3555B7 #B75635 #96B735

monochromatic

#1A2958 #273F88 #3555B7 #5A77CF #899EDD

Accessibility & contrast

On white

6.70

#3555B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#3555B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3555B7

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3555B7	#FFFFFF	#000000	##FFFFFF
##3555B7	1.00	6.70	3.13	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D62BA

Deuteranopia (green-blind)

#0056B5

Tritanopia (blue-blind)

#006D7E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3555b7;
/* rgb */ color: rgb(53, 85, 183);
/* oklch */ color: oklch(48.2% 0.160 266.7);

Tailwind

colors: {
  custom: {
    50: '#7d84cd',
    500: '#3555b7',
    950: '#000000',
  },
}

SCSS

$custom: #3555b7;
$custom-light: #7d84cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3555b7",
  "rgb": {
    "r": 53,
    "g": 85,
    "b": 183
  },
  "hsl": {
    "h": 225.231,
    "s": 55.085,
    "l": 46.275
  },
  "oklch": {
    "l": 0.48242,
    "c": 0.15957,
    "h": 266.7
  },
  "luminance": 0.10673
}

Semantic roles & 50–950 ramp

primary

#3555B7

secondary

#C7B681

accent

#BA49DE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3555B7

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

Preview Lab → · Contrast checker → · Palette generator →