#3740C4#3740C4

#3740C4 is a mid, highly saturated blue. Relative luminance 0.085; OKLCH L 45.6% C 0.202 H 272.3°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#3740C4
RGB	rgb(55, 64, 196)
HSL	hsl(236, 56%, 49%)
HSV	hsv(236, 72%, 77%)
CMYK	cmyk(71.9%, 67.3%, 0%, 23.1%)
CIE-LAB	lab(34.93, 40.51, -69.66)
CIE-LCH	lch(34.93, 80.58, 300.18°)
OKLab	oklab(45.56% 0.008 -0.2014)
OKLCH	oklch(45.56% 0.202 272.3)
XYZ	xyz(13.3694, 8.4632, 53.1428)
Luminance	0.0847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3740C4 #C4BB37

analogous

#3787C4 #3740C4 #7537C4

triadic

#3740C4 #C43740 #40C437

tetradic

#3740C4 #C43787 #C4BB37 #37C475

square

#3740C4 #C43787 #C4BB37 #37C475

split-complementary

#3740C4 #C47537 #87C437

monochromatic

#1C2164 #2A3094 #3740C4 #656CD4 #9499E1

Accessibility & contrast

On white

7.80

#3740C4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#3740C4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3740C4

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3740C4	#FFFFFF	#000000	##FFFFFF
##3740C4	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059C8

Deuteranopia (green-blind)

#004CC2

Tritanopia (blue-blind)

#00647D

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3740c4;
/* rgb */ color: rgb(55, 64, 196);
/* oklch */ color: oklch(45.6% 0.202 272.3);

Tailwind

colors: {
  custom: {
    50: '#8275d7',
    500: '#3740c4',
    950: '#000000',
  },
}

SCSS

$custom: #3740c4;
$custom-light: #8275d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3740c4",
  "rgb": {
    "r": 55,
    "g": 64,
    "b": 196
  },
  "hsl": {
    "h": 236.17,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.45564,
    "c": 0.20156,
    "h": 272.3
  },
  "luminance": 0.08465
}

Semantic roles & 50–950 ramp

primary

#3740C4

secondary

#CCC88B

accent

#D648DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #3740C4

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

Preview Lab → · Contrast checker → · Palette generator →