#3550BB#3550BB

#3550BB is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.6% C 0.171 H 268.4°. Best body text is #FFFFFF at 6.96:1 contrast (WCAG AA passes).

Color values

HEX	#3550BB
RGB	rgb(53, 80, 187)
HSL	hsl(228, 56%, 47%)
HSV	hsv(228, 72%, 73%)
CMYK	cmyk(71.7%, 57.2%, 0%, 26.7%)
CIE-LAB	lab(37.99, 26.90, -59.40)
CIE-LCH	lch(37.99, 65.20, 294.37°)
OKLab	oklab(47.56% -0.0049 -0.1712)
OKLCH	oklch(47.56% 0.171 268.4)
XYZ	xyz(13.3034, 10.0807, 48.2487)
Luminance	0.1008 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3550BB #BBA035

analogous

#3593BB #3550BB #5D35BB

triadic

#3550BB #BB3550 #50BB35

tetradic

#3550BB #BB3593 #BBA035 #35BB5D

square

#3550BB #BB3593 #BBA035 #35BB5D

split-complementary

#3550BB #BB5D35 #93BB35

monochromatic

#1A275C #273C8B #3550BB #5C74D1 #8C9DDE

Accessibility & contrast

On white

6.96

#3550BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#3550BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3550BB

6.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3550BB	#FFFFFF	#000000	##FFFFFF
##3550BB	1.00	6.96	3.02	6.96
#FFFFFF	6.96	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060BF

Deuteranopia (green-blind)

#0053B9

Tritanopia (blue-blind)

#006A7D

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3550bb;
/* rgb */ color: rgb(53, 80, 187);
/* oklch */ color: oklch(47.6% 0.171 268.4);

Tailwind

colors: {
  custom: {
    50: '#7e80d0',
    500: '#3550bb',
    950: '#000000',
  },
}

SCSS

$custom: #3550bb;
$custom-light: #7e80d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3550bb",
  "rgb": {
    "r": 53,
    "g": 80,
    "b": 187
  },
  "hsl": {
    "h": 227.91,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.47557,
    "c": 0.17128,
    "h": 268.4
  },
  "luminance": 0.10082
}

Semantic roles & 50–950 ramp

primary

#3550BB

secondary

#C9BB83

accent

#C149DF

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3550BB

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

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