#3751BF#3751BF

#3751BF is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.2% C 0.175 H 268.8°. Best body text is #FFFFFF at 6.79:1 contrast (WCAG AA passes).

Color values

HEX	#3751BF
RGB	rgb(55, 81, 191)
HSL	hsl(229, 55%, 48%)
HSV	hsv(229, 71%, 75%)
CMYK	cmyk(71.2%, 57.6%, 0%, 25.1%)
CIE-LAB	lab(38.65, 27.98, -60.65)
CIE-LCH	lch(38.65, 66.80, 294.77°)
OKLab	oklab(48.18% -0.0037 -0.1748)
OKLCH	oklch(48.18% 0.175 268.8)
XYZ	xyz(13.9187, 10.4573, 50.5650)
Luminance	0.1046 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3751BF #BFA537

analogous

#3795BF #3751BF #6137BF

triadic

#3751BF #BF3751 #51BF37

tetradic

#3751BF #BF3795 #BFA537 #37BF61

square

#3751BF #BF3795 #BFA537 #37BF61

split-complementary

#3751BF #BF6137 #95BF37

monochromatic

#1C2960 #293D8F #3751BF #6277D2 #91A0DF

Accessibility & contrast

On white

6.79

#3751BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#3751BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3751BF

6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3751BF	#FFFFFF	#000000	##FFFFFF
##3751BF	1.00	6.79	3.09	6.79
#FFFFFF	6.79	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C3

Deuteranopia (green-blind)

#0055BD

Tritanopia (blue-blind)

#006C80

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3751bf;
/* rgb */ color: rgb(55, 81, 191);
/* oklch */ color: oklch(48.2% 0.175 268.8);

Tailwind

colors: {
  custom: {
    50: '#7f81d3',
    500: '#3751bf',
    950: '#000000',
  },
}

SCSS

$custom: #3751bf;
$custom-light: #7f81d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3751bf",
  "rgb": {
    "r": 55,
    "g": 81,
    "b": 191
  },
  "hsl": {
    "h": 228.529,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.48177,
    "c": 0.17489,
    "h": 268.8
  },
  "luminance": 0.10459
}

Semantic roles & 50–950 ramp

primary

#3751BF

secondary

#CABD88

accent

#C249DF

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0B0A14

muted

#7C7C83

Preview Lab

Preview with #3751BF

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

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