#3551BC#3551BC

#3551BC is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.8% C 0.171 H 268.1°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX	#3551BC
RGB	rgb(53, 81, 188)
HSL	hsl(228, 56%, 47%)
HSV	hsv(228, 72%, 74%)
CMYK	cmyk(71.8%, 56.9%, 0%, 26.3%)
CIE-LAB	lab(38.32, 26.62, -59.43)
CIE-LCH	lch(38.32, 65.12, 294.13°)
OKLab	oklab(47.83% -0.0057 -0.1713)
OKLCH	oklch(47.83% 0.171 268.1)
XYZ	xyz(13.4846, 10.2712, 48.8391)
Luminance	0.1027 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3551BC #BCA035

analogous

#3594BC #3551BC #5D35BC

triadic

#3551BC #BC3551 #51BC35

tetradic

#3551BC #BC3594 #BCA035 #35BC5D

square

#3551BC #BC3594 #BCA035 #35BC5D

split-complementary

#3551BC #BC5D35 #94BC35

monochromatic

#1A285D #283C8C #3551BC #5D75D1 #8D9EDF

Accessibility & contrast

On white

6.87

#3551BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#3551BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3551BC

6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3551BC	#FFFFFF	#000000	##FFFFFF
##3551BC	1.00	6.87	3.05	6.87
#FFFFFF	6.87	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C0

Deuteranopia (green-blind)

#0054BA

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3551bc;
/* rgb */ color: rgb(53, 81, 188);
/* oklch */ color: oklch(47.8% 0.171 268.1);

Tailwind

colors: {
  custom: {
    50: '#7e81d1',
    500: '#3551bc',
    950: '#000000',
  },
}

SCSS

$custom: #3551bc;
$custom-light: #7e81d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3551bc",
  "rgb": {
    "r": 53,
    "g": 81,
    "b": 188
  },
  "hsl": {
    "h": 227.556,
    "s": 56.017,
    "l": 47.255
  },
  "oklch": {
    "l": 0.47834,
    "c": 0.1714,
    "h": 268.1
  },
  "luminance": 0.10273
}

Semantic roles & 50–950 ramp

primary

#3551BC

secondary

#C9BB84

accent

#C048DF

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3551BC

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

Preview Lab → · Contrast checker → · Palette generator →