#3743BF#3743BF

#3743BF is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.6% C 0.192 H 271.9°. Best body text is #FFFFFF at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#3743BF
RGB	rgb(55, 67, 191)
HSL	hsl(235, 55%, 48%)
HSV	hsv(235, 71%, 75%)
CMYK	cmyk(71.2%, 64.9%, 0%, 25.1%)
CIE-LAB	lab(35.18, 36.92, -66.33)
CIE-LCH	lch(35.18, 75.91, 299.10°)
OKLab	oklab(45.61% 0.0065 -0.1916)
OKLCH	oklch(45.61% 0.192 271.9)
XYZ	xyz(12.9835, 8.5868, 50.2533)
Luminance	0.0859 (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

#3743BF #BFB337

analogous

#3787BF #3743BF #6F37BF

triadic

#3743BF #BF3743 #43BF37

tetradic

#3743BF #BF3787 #BFB337 #37BF6F

square

#3743BF #BF3787 #BFB337 #37BF6F

split-complementary

#3743BF #BF6F37 #87BF37

monochromatic

#1C2260 #29328F #3743BF #626BD2 #9198DF

Accessibility & contrast

On white

7.73

#3743BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3743BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743BF

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743BF	#FFFFFF	#000000	##FFFFFF
##3743BF	1.00	7.73	2.72	7.73
#FFFFFF	7.73	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059C3

Deuteranopia (green-blind)

#004CBD

Tritanopia (blue-blind)

#00647B

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3743bf;
/* rgb */ color: rgb(55, 67, 191);
/* oklch */ color: oklch(45.6% 0.192 271.9);

Tailwind

colors: {
  custom: {
    50: '#8177d3',
    500: '#3743bf',
    950: '#000000',
  },
}

SCSS

$custom: #3743bf;
$custom-light: #8177d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3743bf",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 191
  },
  "hsl": {
    "h": 234.706,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.45607,
    "c": 0.19174,
    "h": 271.9
  },
  "luminance": 0.08588
}

Semantic roles & 50–950 ramp

primary

#3743BF

secondary

#CAC488

accent

#D149DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3743BF

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

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