#3757B7#3757B7

#3757B7 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.7% C 0.156 H 266.7°. Best body text is #FFFFFF at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#3757B7
RGB	rgb(55, 87, 183)
HSL	hsl(225, 54%, 47%)
HSV	hsv(225, 70%, 72%)
CMYK	cmyk(69.9%, 52.5%, 0%, 28.2%)
CIE-LAB	lab(39.66, 21.15, -54.34)
CIE-LCH	lch(39.66, 58.31, 291.27°)
OKLab	oklab(48.75% -0.0091 -0.1562)
OKLCH	oklch(48.75% 0.156 266.7)
XYZ	xyz(13.5280, 11.0462, 46.2097)
Luminance	0.1105 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757B7 #B79737

analogous

#3797B7 #3757B7 #5737B7

triadic

#3757B7 #B73757 #57B737

tetradic

#3757B7 #B73797 #B79737 #37B757

square

#3757B7 #B73797 #B79737 #37B757

split-complementary

#3757B7 #B75737 #97B737

monochromatic

#1B2A59 #294188 #3757B7 #5D79CE #8CA0DC

Accessibility & contrast

On white

6.54

#3757B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3757B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757B7

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757B7	#FFFFFF	#000000	##FFFFFF
##3757B7	1.00	6.54	3.21	6.54
#FFFFFF	6.54	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1864BA

Deuteranopia (green-blind)

#0058B5

Tritanopia (blue-blind)

#006E7E

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3757b7;
/* rgb */ color: rgb(55, 87, 183);
/* oklch */ color: oklch(48.7% 0.156 266.7);

Tailwind

colors: {
  custom: {
    50: '#7d85cd',
    500: '#3757b7',
    950: '#000000',
  },
}

SCSS

$custom: #3757b7;
$custom-light: #7d85cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3757b7",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 183
  },
  "hsl": {
    "h": 225,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.48749,
    "c": 0.15645,
    "h": 266.7
  },
  "luminance": 0.11048
}

Semantic roles & 50–950 ramp

primary

#3757B7

secondary

#C7B683

accent

#B94BDD

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3757B7

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

Preview Lab → · Contrast checker → · Palette generator →