#3757BA#3757BA

#3757BA is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.0% C 0.161 H 266.8°. Best body text is #FFFFFF at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#3757BA
RGB	rgb(55, 87, 186)
HSL	hsl(225, 54%, 47%)
HSV	hsv(225, 70%, 73%)
CMYK	cmyk(70.4%, 53.2%, 0%, 27.1%)
CIE-LAB	lab(39.87, 22.26, -55.75)
CIE-LCH	lch(39.87, 60.03, 291.76°)
OKLab	oklab(48.98% -0.0089 -0.1603)
OKLCH	oklch(48.98% 0.161 266.8)
XYZ	xyz(13.8436, 11.1724, 47.8718)
Luminance	0.1117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757BA #BA9A37

analogous

#3798BA #3757BA #5937BA

triadic

#3757BA #BA3757 #57BA37

tetradic

#3757BA #BA3798 #BA9A37 #37BA59

square

#3757BA #BA3798 #BA9A37 #37BA59

split-complementary

#3757BA #BA5937 #98BA37

monochromatic

#1B2B5C #29418B #3757BA #5F7AD0 #8EA1DE

Accessibility & contrast

On white

6.49

#3757BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#3757BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757BA

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757BA	#FFFFFF	#000000	##FFFFFF
##3757BA	1.00	6.49	3.23	6.49
#FFFFFF	6.49	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1164BD

Deuteranopia (green-blind)

#0058B8

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3757ba;
/* rgb */ color: rgb(55, 87, 186);
/* oklch */ color: oklch(49.0% 0.161 266.8);

Tailwind

colors: {
  custom: {
    50: '#7e85cf',
    500: '#3757ba',
    950: '#000000',
  },
}

SCSS

$custom: #3757ba;
$custom-light: #7e85cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3757ba",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 186
  },
  "hsl": {
    "h": 225.344,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.48976,
    "c": 0.1606,
    "h": 266.8
  },
  "luminance": 0.11174
}

Semantic roles & 50–950 ramp

primary

#3757BA

secondary

#C8B885

accent

#BA4ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3757BA

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

Preview Lab → · Contrast checker → · Palette generator →