#3759BB#3759BB

#3759BB is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.5% C 0.159 H 266.2°. Best body text is #FFFFFF at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#3759BB
RGB	rgb(55, 89, 187)
HSL	hsl(225, 55%, 47%)
HSV	hsv(225, 71%, 73%)
CMYK	cmyk(70.6%, 52.4%, 0%, 26.7%)
CIE-LAB	lab(40.48, 21.32, -55.35)
CIE-LCH	lch(40.48, 59.31, 291.07°)
OKLab	oklab(49.46% -0.0105 -0.1591)
OKLCH	oklch(49.46% 0.159 266.2)
XYZ	xyz(14.1144, 11.5434, 48.4883)
Luminance	0.1154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3759BB #BB9937

analogous

#379BBB #3759BB #5737BB

triadic

#3759BB #BB3759 #59BB37

tetradic

#3759BB #BB379B #BB9937 #37BB57

square

#3759BB #BB379B #BB9937 #37BB57

split-complementary

#3759BB #BB5737 #9BBB37

monochromatic

#1B2C5C #29428C #3759BB #5F7CD0 #8EA3DE

Accessibility & contrast

On white

6.35

#3759BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#3759BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3759BB

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3759BB	#FFFFFF	#000000	##FFFFFF
##3759BB	1.00	6.35	3.31	6.35
#FFFFFF	6.35	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1866BE

Deuteranopia (green-blind)

#005AB9

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3759bb;
/* rgb */ color: rgb(55, 89, 187);
/* oklch */ color: oklch(49.5% 0.159 266.2);

Tailwind

colors: {
  custom: {
    50: '#7e87d0',
    500: '#3759bb',
    950: '#000000',
  },
}

SCSS

$custom: #3759bb;
$custom-light: #7e87d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3759bb",
  "rgb": {
    "r": 55,
    "g": 89,
    "b": 187
  },
  "hsl": {
    "h": 224.545,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.49462,
    "c": 0.15948,
    "h": 266.2
  },
  "luminance": 0.11545
}

Semantic roles & 50–950 ramp

primary

#3759BB

secondary

#C9B785

accent

#B84ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3759BB

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

Preview Lab → · Contrast checker → · Palette generator →