#3759B8#3759B8

#3759B8 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.2% C 0.155 H 266.0°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#3759B8
RGB	rgb(55, 89, 184)
HSL	hsl(224, 54%, 47%)
HSV	hsv(224, 70%, 72%)
CMYK	cmyk(70.1%, 51.6%, 0%, 27.8%)
CIE-LAB	lab(40.27, 20.22, -53.93)
CIE-LCH	lch(40.27, 57.59, 290.55°)
OKLab	oklab(49.24% -0.0108 -0.1549)
OKLCH	oklch(49.24% 0.155 266)
XYZ	xyz(13.7966, 11.4163, 46.8146)
Luminance	0.1142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3759B8 #B89637

analogous

#379AB8 #3759B8 #5637B8

triadic

#3759B8 #B83759 #59B837

tetradic

#3759B8 #B8379A #B89637 #37B856

square

#3759B8 #B8379A #B89637 #37B856

split-complementary

#3759B8 #B85637 #9AB837

monochromatic

#1B2B5A #294289 #3759B8 #5D7BCF #8DA2DD

Accessibility & contrast

On white

6.40

#3759B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#3759B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3759B8

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3759B8	#FFFFFF	#000000	##FFFFFF
##3759B8	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E65BB

Deuteranopia (green-blind)

#0059B6

Tritanopia (blue-blind)

#007080

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3759b8;
/* rgb */ color: rgb(55, 89, 184);
/* oklch */ color: oklch(49.2% 0.155 266.0);

Tailwind

colors: {
  custom: {
    50: '#7e87ce',
    500: '#3759b8',
    950: '#000000',
  },
}

SCSS

$custom: #3759b8;
$custom-light: #7e87ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3759b8",
  "rgb": {
    "r": 55,
    "g": 89,
    "b": 184
  },
  "hsl": {
    "h": 224.186,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.49238,
    "c": 0.15532,
    "h": 266
  },
  "luminance": 0.11418
}

Semantic roles & 50–950 ramp

primary

#3759B8

secondary

#C7B584

accent

#B74ADD

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3759B8

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

Preview Lab → · Contrast checker → · Palette generator →