#3751BD#3751BD

#3751BD is a mid, vivid blue. Relative luminance 0.104; OKLCH L 48.0% C 0.172 H 268.7°. Best body text is #FFFFFF at 6.83:1 contrast (WCAG AA passes).

Color values

HEX	#3751BD
RGB	rgb(55, 81, 189)
HSL	hsl(228, 55%, 48%)
HSV	hsv(228, 71%, 74%)
CMYK	cmyk(70.9%, 57.1%, 0%, 25.9%)
CIE-LAB	lab(38.50, 27.25, -59.73)
CIE-LCH	lch(38.50, 65.66, 294.53°)
OKLab	oklab(48.01% -0.0038 -0.1721)
OKLCH	oklch(48.01% 0.172 268.7)
XYZ	xyz(13.7001, 10.3698, 49.4138)
Luminance	0.1037 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3751BD #BDA337

analogous

#3794BD #3751BD #6037BD

triadic

#3751BD #BD3751 #51BD37

tetradic

#3751BD #BD3794 #BDA337 #37BD60

square

#3751BD #BD3794 #BDA337 #37BD60

split-complementary

#3751BD #BD6037 #94BD37

monochromatic

#1B285E #293D8E #3751BD #6076D1 #909FDF

Accessibility & contrast

On white

6.83

#3751BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#3751BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3751BD

6.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3751BD	#FFFFFF	#000000	##FFFFFF
##3751BD	1.00	6.83	3.07	6.83
#FFFFFF	6.83	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C1

Deuteranopia (green-blind)

#0055BB

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3751bd;
/* rgb */ color: rgb(55, 81, 189);
/* oklch */ color: oklch(48.0% 0.172 268.7);

Tailwind

colors: {
  custom: {
    50: '#7f81d2',
    500: '#3751bd',
    950: '#000000',
  },
}

SCSS

$custom: #3751bd;
$custom-light: #7f81d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3751bd",
  "rgb": {
    "r": 55,
    "g": 81,
    "b": 189
  },
  "hsl": {
    "h": 228.358,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.48014,
    "c": 0.17218,
    "h": 268.7
  },
  "luminance": 0.10371
}

Semantic roles & 50–950 ramp

primary

#3751BD

secondary

#C9BC86

accent

#C14ADE

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0B0A14

muted

#7C7C83

Preview Lab

Preview with #3751BD

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

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