#3750BF#3750BF

#3750BF is a mid, vivid blue. Relative luminance 0.103; OKLCH L 48.0% C 0.176 H 269.0°. Best body text is #FFFFFF at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#3750BF
RGB	rgb(55, 80, 191)
HSL	hsl(229, 55%, 48%)
HSV	hsv(229, 71%, 75%)
CMYK	cmyk(71.2%, 58.1%, 0%, 25.1%)
CIE-LAB	lab(38.39, 28.63, -61.07)
CIE-LCH	lch(38.39, 67.45, 295.12°)
OKLab	oklab(47.98% -0.0029 -0.1761)
OKLCH	oklch(47.98% 0.176 269)
XYZ	xyz(13.8449, 10.3097, 50.5404)
Luminance	0.1031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3750BF #BFA637

analogous

#3794BF #3750BF #6237BF

triadic

#3750BF #BF3750 #50BF37

tetradic

#3750BF #BF3794 #BFA637 #37BF62

square

#3750BF #BF3794 #BFA637 #37BF62

split-complementary

#3750BF #BF6237 #94BF37

monochromatic

#1C2860 #293C8F #3750BF #6276D2 #919FDF

Accessibility & contrast

On white

6.86

#3750BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3750BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3750BF

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3750BF	#FFFFFF	#000000	##FFFFFF
##3750BF	1.00	6.86	3.06	6.86
#FFFFFF	6.86	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C3

Deuteranopia (green-blind)

#0054BD

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3750bf;
/* rgb */ color: rgb(55, 80, 191);
/* oklch */ color: oklch(48.0% 0.176 269.0);

Tailwind

colors: {
  custom: {
    50: '#8080d3',
    500: '#3750bf',
    950: '#000000',
  },
}

SCSS

$custom: #3750bf;
$custom-light: #8080d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3750bf",
  "rgb": {
    "r": 55,
    "g": 80,
    "b": 191
  },
  "hsl": {
    "h": 228.971,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.47984,
    "c": 0.17612,
    "h": 269
  },
  "luminance": 0.10311
}

Semantic roles & 50–950 ramp

primary

#3750BF

secondary

#CABE88

accent

#C349DF

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3750BF

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

Preview Lab → · Contrast checker → · Palette generator →