#3555BB#3555BB

#3555BB is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.6% C 0.165 H 266.9°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#3555BB
RGB	rgb(53, 85, 187)
HSL	hsl(226, 56%, 47%)
HSV	hsv(226, 72%, 73%)
CMYK	cmyk(71.7%, 54.5%, 0%, 26.7%)
CIE-LAB	lab(39.31, 23.65, -57.25)
CIE-LCH	lch(39.31, 61.94, 292.44°)
OKLab	oklab(48.55% -0.0089 -0.1648)
OKLCH	oklch(48.55% 0.165 266.9)
XYZ	xyz(13.6832, 10.8403, 48.3753)
Luminance	0.1084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3555BB #BB9B35

analogous

#3598BB #3555BB #5835BB

triadic

#3555BB #BB3555 #55BB35

tetradic

#3555BB #BB3598 #BB9B35 #35BB58

square

#3555BB #BB3598 #BB9B35 #35BB58

split-complementary

#3555BB #BB5835 #98BB35

monochromatic

#1A2A5C #273F8B #3555BB #5C78D1 #8CA0DE

Accessibility & contrast

On white

6.63

#3555BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#3555BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3555BB

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3555BB	#FFFFFF	#000000	##FFFFFF
##3555BB	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063BF

Deuteranopia (green-blind)

#0057B9

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3555bb;
/* rgb */ color: rgb(53, 85, 187);
/* oklch */ color: oklch(48.6% 0.165 266.9);

Tailwind

colors: {
  custom: {
    50: '#7e84d0',
    500: '#3555bb',
    950: '#000000',
  },
}

SCSS

$custom: #3555bb;
$custom-light: #7e84d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3555bb",
  "rgb": {
    "r": 53,
    "g": 85,
    "b": 187
  },
  "hsl": {
    "h": 225.672,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.48551,
    "c": 0.16506,
    "h": 266.9
  },
  "luminance": 0.10842
}

Semantic roles & 50–950 ramp

primary

#3555BB

secondary

#C9B883

accent

#BB49DF

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3555BB

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

Preview Lab → · Contrast checker → · Palette generator →