#3743BA#3743BA

#3743BA is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.2% C 0.185 H 272.1°. Best body text is #FFFFFF at 7.85:1 contrast (WCAG AA passes).

Color values

HEX	#3743BA
RGB	rgb(55, 67, 186)
HSL	hsl(235, 54%, 47%)
HSV	hsv(235, 70%, 73%)
CMYK	cmyk(70.4%, 64%, 0%, 27.1%)
CIE-LAB	lab(34.74, 35.16, -64.10)
CIE-LCH	lch(34.74, 73.11, 298.75°)
OKLab	oklab(45.16% 0.0068 -0.1851)
OKLCH	oklch(45.16% 0.185 272.1)
XYZ	xyz(12.4426, 8.3705, 47.4048)
Luminance	0.0837 (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

#3743BA #BAAE37

analogous

#3784BA #3743BA #6D37BA

triadic

#3743BA #BA3743 #43BA37

tetradic

#3743BA #BA3784 #BAAE37 #37BA6D

square

#3743BA #BA3784 #BAAE37 #37BA6D

split-complementary

#3743BA #BA6D37 #84BA37

monochromatic

#1B215C #29328B #3743BA #5F69D0 #8E95DE

Accessibility & contrast

On white

7.85

#3743BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#3743BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743BA

7.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743BA	#FFFFFF	#000000	##FFFFFF
##3743BA	1.00	7.85	2.67	7.85
#FFFFFF	7.85	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BE

Deuteranopia (green-blind)

#004CB8

Tritanopia (blue-blind)

#006278

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3743ba;
/* rgb */ color: rgb(55, 67, 186);
/* oklch */ color: oklch(45.2% 0.185 272.1);

Tailwind

colors: {
  custom: {
    50: '#7f77d0',
    500: '#3743ba',
    950: '#000000',
  },
}

SCSS

$custom: #3743ba;
$custom-light: #7f77d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3743ba",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 186
  },
  "hsl": {
    "h": 234.504,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.45156,
    "c": 0.18522,
    "h": 272.1
  },
  "luminance": 0.08372
}

Semantic roles & 50–950 ramp

primary

#3743BA

secondary

#C8C285

accent

#D04ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3743BA

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

Preview Lab → · Contrast checker → · Palette generator →