#3555B9#3555B9

#3555B9 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.4% C 0.162 H 266.8°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#3555B9
RGB	rgb(53, 85, 185)
HSL	hsl(225, 55%, 47%)
HSV	hsv(225, 71%, 73%)
CMYK	cmyk(71.4%, 54.1%, 0%, 27.5%)
CIE-LAB	lab(39.17, 22.91, -56.31)
CIE-LCH	lch(39.17, 60.79, 292.14°)
OKLab	oklab(48.4% -0.0091 -0.1621)
OKLCH	oklch(48.4% 0.162 266.8)
XYZ	xyz(13.4706, 10.7553, 47.2556)
Luminance	0.1076 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3555B9 #B99935

analogous

#3597B9 #3555B9 #5735B9

triadic

#3555B9 #B93555 #55B935

tetradic

#3555B9 #B93597 #B99935 #35B957

square

#3555B9 #B93597 #B99935 #35B957

split-complementary

#3555B9 #B95735 #97B935

monochromatic

#1A295A #273F89 #3555B9 #5B77D0 #8B9FDE

Accessibility & contrast

On white

6.66

#3555B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#3555B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3555B9

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3555B9	#FFFFFF	#000000	##FFFFFF
##3555B9	1.00	6.66	3.15	6.66
#FFFFFF	6.66	1.00	21.00	1.00
#000000	3.15	21.00	1.00	21.00
##FFFFFF	6.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0563BC

Deuteranopia (green-blind)

#0056B7

Tritanopia (blue-blind)

#006D7E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3555b9;
/* rgb */ color: rgb(53, 85, 185);
/* oklch */ color: oklch(48.4% 0.162 266.8);

Tailwind

colors: {
  custom: {
    50: '#7d84cf',
    500: '#3555b9',
    950: '#000000',
  },
}

SCSS

$custom: #3555b9;
$custom-light: #7d84cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3555b9",
  "rgb": {
    "r": 53,
    "g": 85,
    "b": 185
  },
  "hsl": {
    "h": 225.455,
    "s": 55.462,
    "l": 46.667
  },
  "oklch": {
    "l": 0.48396,
    "c": 0.16232,
    "h": 266.8
  },
  "luminance": 0.10757
}

Semantic roles & 50–950 ramp

primary

#3555B9

secondary

#C8B782

accent

#BA49DF

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3555B9

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

Preview Lab → · Contrast checker → · Palette generator →