#3553BB#3553BB

#3553BB is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.1% C 0.168 H 267.5°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#3553BB
RGB	rgb(53, 83, 187)
HSL	hsl(227, 56%, 47%)
HSV	hsv(227, 72%, 73%)
CMYK	cmyk(71.7%, 55.6%, 0%, 26.7%)
CIE-LAB	lab(38.78, 24.95, -58.11)
CIE-LCH	lch(38.78, 63.24, 293.23°)
OKLab	oklab(48.15% -0.0073 -0.1674)
OKLCH	oklch(48.15% 0.168 267.5)
XYZ	xyz(13.5280, 10.5299, 48.3236)
Luminance	0.1053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3553BB #BB9D35

analogous

#3596BB #3553BB #5A35BB

triadic

#3553BB #BB3553 #53BB35

tetradic

#3553BB #BB3596 #BB9D35 #35BB5A

square

#3553BB #BB3596 #BB9D35 #35BB5A

split-complementary

#3553BB #BB5A35 #96BB35

monochromatic

#1A295C #273E8B #3553BB #5C76D1 #8C9EDE

Accessibility & contrast

On white

6.76

#3553BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3553BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3553BB

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3553BB	#FFFFFF	#000000	##FFFFFF
##3553BB	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062BF

Deuteranopia (green-blind)

#0055B9

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3553bb;
/* rgb */ color: rgb(53, 83, 187);
/* oklch */ color: oklch(48.1% 0.168 267.5);

Tailwind

colors: {
  custom: {
    50: '#7e82d0',
    500: '#3553bb',
    950: '#000000',
  },
}

SCSS

$custom: #3553bb;
$custom-light: #7e82d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3553bb",
  "rgb": {
    "r": 53,
    "g": 83,
    "b": 187
  },
  "hsl": {
    "h": 226.567,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.4815,
    "c": 0.16756,
    "h": 267.5
  },
  "luminance": 0.10531
}

Semantic roles & 50–950 ramp

primary

#3553BB

secondary

#C9B983

accent

#BD49DF

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3553BB

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

Preview Lab → · Contrast checker → · Palette generator →