#3759BC#3759BC

#3759BC is a mid, vivid blue. Relative luminance 0.116; OKLCH L 49.5% C 0.161 H 266.3°. Best body text is #FFFFFF at 6.33:1 contrast (WCAG AA passes).

Color values

HEX	#3759BC
RGB	rgb(55, 89, 188)
HSL	hsl(225, 55%, 48%)
HSV	hsv(225, 71%, 74%)
CMYK	cmyk(70.7%, 52.7%, 0%, 26.3%)
CIE-LAB	lab(40.55, 21.69, -55.82)
CIE-LCH	lch(40.55, 59.89, 291.24°)
OKLab	oklab(49.54% -0.0104 -0.1605)
OKLCH	oklch(49.54% 0.161 266.3)
XYZ	xyz(14.2219, 11.5864, 49.0541)
Luminance	0.1159 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3759BC #BC9A37

analogous

#379BBC #3759BC #5837BC

triadic

#3759BC #BC3759 #59BC37

tetradic

#3759BC #BC379B #BC9A37 #37BC58

square

#3759BC #BC379B #BC9A37 #37BC58

split-complementary

#3759BC #BC5837 #9BBC37

monochromatic

#1B2C5D #29438D #3759BC #607DD0 #8FA3DE

Accessibility & contrast

On white

6.33

#3759BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.32

#3759BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3759BC

6.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3759BC	#FFFFFF	#000000	##FFFFFF
##3759BC	1.00	6.33	3.32	6.33
#FFFFFF	6.33	1.00	21.00	1.00
#000000	3.32	21.00	1.00	21.00
##FFFFFF	6.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1666C0

Deuteranopia (green-blind)

#005ABA

Tritanopia (blue-blind)

#007182

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3759bc;
/* rgb */ color: rgb(55, 89, 188);
/* oklch */ color: oklch(49.5% 0.161 266.3);

Tailwind

colors: {
  custom: {
    50: '#7e87d1',
    500: '#3759bc',
    950: '#000000',
  },
}

SCSS

$custom: #3759bc;
$custom-light: #7e87d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3759bc",
  "rgb": {
    "r": 55,
    "g": 89,
    "b": 188
  },
  "hsl": {
    "h": 224.662,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.49537,
    "c": 0.16086,
    "h": 266.3
  },
  "luminance": 0.11588
}

Semantic roles & 50–950 ramp

primary

#3759BC

secondary

#C9B886

accent

#B84ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3759BC

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

Preview Lab → · Contrast checker → · Palette generator →