#3757BC#3757BC

#3757BC is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.1% C 0.163 H 266.9°. Best body text is #FFFFFF at 6.46:1 contrast (WCAG AA passes).

Color values

HEX	#3757BC
RGB	rgb(55, 87, 188)
HSL	hsl(226, 55%, 48%)
HSV	hsv(226, 71%, 74%)
CMYK	cmyk(70.7%, 53.7%, 0%, 26.3%)
CIE-LAB	lab(40.01, 22.99, -56.69)
CIE-LCH	lch(40.01, 61.18, 292.07°)
OKLab	oklab(49.13% -0.0087 -0.1631)
OKLCH	oklch(49.13% 0.163 266.9)
XYZ	xyz(14.0577, 11.2580, 48.9994)
Luminance	0.1126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757BC #BC9C37

analogous

#3799BC #3757BC #5937BC

triadic

#3757BC #BC3757 #57BC37

tetradic

#3757BC #BC3799 #BC9C37 #37BC59

square

#3757BC #BC3799 #BC9C37 #37BC59

split-complementary

#3757BC #BC5937 #99BC37

monochromatic

#1B2B5D #29418D #3757BC #607BD0 #8FA2DE

Accessibility & contrast

On white

6.46

#3757BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#3757BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757BC

6.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757BC	#FFFFFF	#000000	##FFFFFF
##3757BC	1.00	6.46	3.25	6.46
#FFFFFF	6.46	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A65C0

Deuteranopia (green-blind)

#0058BA

Tritanopia (blue-blind)

#006F81

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3757bc;
/* rgb */ color: rgb(55, 87, 188);
/* oklch */ color: oklch(49.1% 0.163 266.9);

Tailwind

colors: {
  custom: {
    50: '#7e85d1',
    500: '#3757bc',
    950: '#000000',
  },
}

SCSS

$custom: #3757bc;
$custom-light: #7e85d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3757bc",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 188
  },
  "hsl": {
    "h": 225.564,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.49129,
    "c": 0.16335,
    "h": 266.9
  },
  "luminance": 0.11259
}

Semantic roles & 50–950 ramp

primary

#3757BC

secondary

#C9B986

accent

#BA4ADE

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B14

muted

#7C7C82

Preview Lab

Preview with #3757BC

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

Preview Lab → · Contrast checker → · Palette generator →