#3750B7#3750B7

#3750B7 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.3% C 0.165 H 268.9°. Best body text is #FFFFFF at 7.01:1 contrast (WCAG AA passes).

Color values

HEX	#3750B7
RGB	rgb(55, 80, 183)
HSL	hsl(228, 54%, 47%)
HSV	hsv(228, 70%, 72%)
CMYK	cmyk(69.9%, 56.3%, 0%, 28.2%)
CIE-LAB	lab(37.78, 25.71, -57.37)
CIE-LCH	lch(37.78, 62.87, 294.14°)
OKLab	oklab(47.34% -0.0032 -0.1652)
OKLCH	oklch(47.34% 0.165 268.9)
XYZ	xyz(12.9885, 9.9672, 46.0299)
Luminance	0.0997 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3750B7 #B79E37

analogous

#3790B7 #3750B7 #5E37B7

triadic

#3750B7 #B73750 #50B737

tetradic

#3750B7 #B73790 #B79E37 #37B75E

square

#3750B7 #B73790 #B79E37 #37B75E

split-complementary

#3750B7 #B75E37 #90B737

monochromatic

#1B2759 #293B88 #3750B7 #5D73CE #8C9CDC

Accessibility & contrast

On white

7.01

#3750B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#3750B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3750B7

7.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3750B7	#FFFFFF	#000000	##FFFFFF
##3750B7	1.00	7.01	2.99	7.01
#FFFFFF	7.01	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBB

Deuteranopia (green-blind)

#0053B5

Tritanopia (blue-blind)

#00697B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3750b7;
/* rgb */ color: rgb(55, 80, 183);
/* oklch */ color: oklch(47.3% 0.165 268.9);

Tailwind

colors: {
  custom: {
    50: '#7e80cd',
    500: '#3750b7',
    950: '#000000',
  },
}

SCSS

$custom: #3750b7;
$custom-light: #7e80cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3750b7",
  "rgb": {
    "r": 55,
    "g": 80,
    "b": 183
  },
  "hsl": {
    "h": 228.281,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.47336,
    "c": 0.16525,
    "h": 268.9
  },
  "luminance": 0.09968
}

Semantic roles & 50–950 ramp

primary

#3750B7

secondary

#C7BA83

accent

#C14BDD

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3750B7

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

Preview Lab → · Contrast checker → · Palette generator →