#3740BF#3740BF

#3740BF is a mid, vivid blue. Relative luminance 0.082; OKLCH L 45.1% C 0.195 H 272.5°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#3740BF
RGB	rgb(55, 64, 191)
HSL	hsl(236, 55%, 48%)
HSV	hsv(236, 71%, 75%)
CMYK	cmyk(71.2%, 66.5%, 0%, 25.1%)
CIE-LAB	lab(34.48, 38.78, -67.47)
CIE-LCH	lch(34.48, 77.82, 299.89°)
OKLab	oklab(45.1% 0.0084 -0.195)
OKLCH	oklch(45.1% 0.195 272.5)
XYZ	xyz(12.8098, 8.2393, 50.1954)
Luminance	0.0824 (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

#3740BF #BFB637

analogous

#3784BF #3740BF #7237BF

triadic

#3740BF #BF3740 #40BF37

tetradic

#3740BF #BF3784 #BFB637 #37BF72

square

#3740BF #BF3784 #BFB637 #37BF72

split-complementary

#3740BF #BF7237 #84BF37

monochromatic

#1C2060 #29308F #3740BF #6269D2 #9196DF

Accessibility & contrast

On white

7.93

#3740BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#3740BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3740BF

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3740BF	#FFFFFF	#000000	##FFFFFF
##3740BF	1.00	7.93	2.65	7.93
#FFFFFF	7.93	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C3

Deuteranopia (green-blind)

#004BBD

Tritanopia (blue-blind)

#00627A

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3740bf;
/* rgb */ color: rgb(55, 64, 191);
/* oklch */ color: oklch(45.1% 0.195 272.5);

Tailwind

colors: {
  custom: {
    50: '#8175d3',
    500: '#3740bf',
    950: '#000000',
  },
}

SCSS

$custom: #3740bf;
$custom-light: #8175d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3740bf",
  "rgb": {
    "r": 55,
    "g": 64,
    "b": 191
  },
  "hsl": {
    "h": 236.029,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.45096,
    "c": 0.19519,
    "h": 272.5
  },
  "luminance": 0.08241
}

Semantic roles & 50–950 ramp

primary

#3740BF

secondary

#CAC688

accent

#D549DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3740BF

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

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