#3759CF#3759CF

#3759CF is a mid, vivid blue. Relative luminance 0.125; OKLCH L 51.0% C 0.187 H 267.2°. Best body text is #FFFFFF at 6.01:1 contrast (WCAG AA passes).

Color values

HEX	#3759CF
RGB	rgb(55, 89, 207)
HSL	hsl(227, 61%, 51%)
HSV	hsv(227, 73%, 81%)
CMYK	cmyk(73.4%, 57%, 0%, 18.8%)
CIE-LAB	lab(41.94, 28.66, -64.58)
CIE-LCH	lch(41.94, 70.66, 293.93°)
OKLab	oklab(51.02% -0.0092 -0.1863)
OKLCH	oklch(51.02% 0.187 267.2)
XYZ	xyz(16.4065, 12.4602, 60.5598)
Luminance	0.1246 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3759CF #CFAD37

analogous

#37A5CF #3759CF #6137CF

triadic

#3759CF #CF3759 #59CF37

tetradic

#3759CF #CF37A5 #CFAD37 #37CF61

square

#3759CF #CF37A5 #CFAD37 #37CF61

split-complementary

#3759CF #CF6137 #A5CF37

monochromatic

#1B2E71 #2742A2 #3759CF #6882DB #9AABE7

Accessibility & contrast

On white

6.01

#3759CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#3759CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3759CF

6.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3759CF	#FFFFFF	#000000	##FFFFFF
##3759CF	1.00	6.01	3.49	6.01
#FFFFFF	6.01	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD3

Deuteranopia (green-blind)

#005CCD

Tritanopia (blue-blind)

#00768B

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3759cf;
/* rgb */ color: rgb(55, 89, 207);
/* oklch */ color: oklch(51.0% 0.187 267.2);

Tailwind

colors: {
  custom: {
    50: '#8287df',
    500: '#3759cf',
    950: '#000000',
  },
}

SCSS

$custom: #3759cf;
$custom-light: #8287df;
$custom-dark: #000000;

JSON

{
  "hex": "#3759cf",
  "rgb": {
    "r": 55,
    "g": 89,
    "b": 207
  },
  "hsl": {
    "h": 226.579,
    "s": 61.29,
    "l": 51.373
  },
  "oklch": {
    "l": 0.5102,
    "c": 0.18652,
    "h": 267.2
  },
  "luminance": 0.12462
}

Semantic roles & 50–950 ramp

primary

#3759CF

secondary

#D2C38F

accent

#C043E4

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3759CF

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

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