#3740C7#3740C7

#3740C7 is a mid, highly saturated blue. Relative luminance 0.086; OKLCH L 45.8% C 0.205 H 272.1°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#3740C7
RGB	rgb(55, 64, 199)
HSL	hsl(236, 57%, 50%)
HSV	hsv(236, 72%, 78%)
CMYK	cmyk(72.4%, 67.8%, 0%, 22%)
CIE-LAB	lab(35.20, 41.54, -70.96)
CIE-LCH	lch(35.20, 82.22, 300.35°)
OKLab	oklab(45.85% 0.0077 -0.2052)
OKLCH	oklch(45.85% 0.205 272.1)
XYZ	xyz(13.7143, 8.6011, 54.9592)
Luminance	0.0860 (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

#3740C7 #C7BE37

analogous

#3788C7 #3740C7 #7637C7

triadic

#3740C7 #C73740 #40C737

tetradic

#3740C7 #C73788 #C7BE37 #37C776

square

#3740C7 #C73788 #C7BE37 #37C776

split-complementary

#3740C7 #C77637 #88C737

monochromatic

#1C2167 #2A3197 #3740C7 #666DD5 #969BE2

Accessibility & contrast

On white

7.72

#3740C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3740C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3740C7

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3740C7	#FFFFFF	#000000	##FFFFFF
##3740C7	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ACB

Deuteranopia (green-blind)

#004CC4

Tritanopia (blue-blind)

#00657E

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3740c7;
/* rgb */ color: rgb(55, 64, 199);
/* oklch */ color: oklch(45.8% 0.205 272.1);

Tailwind

colors: {
  custom: {
    50: '#8375d9',
    500: '#3740c7',
    950: '#000000',
  },
}

SCSS

$custom: #3740c7;
$custom-light: #8375d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3740c7",
  "rgb": {
    "r": 55,
    "g": 64,
    "b": 199
  },
  "hsl": {
    "h": 236.25,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.45847,
    "c": 0.20534,
    "h": 272.1
  },
  "luminance": 0.08603
}

Semantic roles & 50–950 ramp

primary

#3740C7

secondary

#CDC98C

accent

#D648E0

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #3740C7

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

Preview Lab → · Contrast checker → · Palette generator →