#3550BF#3550BF

#3550BF is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.9% C 0.177 H 268.4°. Best body text is #FFFFFF at 6.88:1 contrast (WCAG AA passes).

Color values

HEX	#3550BF
RGB	rgb(53, 80, 191)
HSL	hsl(228, 57%, 48%)
HSV	hsv(228, 72%, 75%)
CMYK	cmyk(72.3%, 58.1%, 0%, 25.1%)
CIE-LAB	lab(38.30, 28.37, -61.24)
CIE-LCH	lch(38.30, 67.49, 294.86°)
OKLab	oklab(47.88% -0.0048 -0.1766)
OKLCH	oklch(47.88% 0.177 268.4)
XYZ	xyz(13.7376, 10.2544, 50.5354)
Luminance	0.1026 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3550BF #BFA435

analogous

#3595BF #3550BF #5F35BF

triadic

#3550BF #BF3550 #50BF35

tetradic

#3550BF #BF3595 #BFA435 #35BF5F

square

#3550BF #BF3595 #BFA435 #35BF5F

split-complementary

#3550BF #BF5F35 #95BF35

monochromatic

#1A285F #283C8F #3550BF #5F75D3 #8F9EE0

Accessibility & contrast

On white

6.88

#3550BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#3550BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3550BF

6.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3550BF	#FFFFFF	#000000	##FFFFFF
##3550BF	1.00	6.88	3.05	6.88
#FFFFFF	6.88	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C3

Deuteranopia (green-blind)

#0054BD

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3550bf;
/* rgb */ color: rgb(53, 80, 191);
/* oklch */ color: oklch(47.9% 0.177 268.4);

Tailwind

colors: {
  custom: {
    50: '#7f80d3',
    500: '#3550bf',
    950: '#000000',
  },
}

SCSS

$custom: #3550bf;
$custom-light: #7f80d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3550bf",
  "rgb": {
    "r": 53,
    "g": 80,
    "b": 191
  },
  "hsl": {
    "h": 228.261,
    "s": 56.557,
    "l": 47.843
  },
  "oklch": {
    "l": 0.47884,
    "c": 0.17669,
    "h": 268.4
  },
  "luminance": 0.10256
}

Semantic roles & 50–950 ramp

primary

#3550BF

secondary

#CABD85

accent

#C248E0

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0B0A14

muted

#7C7C83

Preview Lab

Preview with #3550BF

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

Preview Lab → · Contrast checker → · Palette generator →