#3751BA#3751BA

#3751BA is a mid, vivid blue. Relative luminance 0.102; OKLCH L 47.8% C 0.168 H 268.7°. Best body text is #FFFFFF at 6.89:1 contrast (WCAG AA passes).

Color values

HEX	#3751BA
RGB	rgb(55, 81, 186)
HSL	hsl(228, 54%, 47%)
HSV	hsv(228, 70%, 73%)
CMYK	cmyk(70.4%, 56.5%, 0%, 27.1%)
CIE-LAB	lab(38.27, 26.16, -58.34)
CIE-LCH	lch(38.27, 63.94, 294.15°)
OKLab	oklab(47.77% -0.0039 -0.1681)
OKLCH	oklch(47.77% 0.168 268.7)
XYZ	xyz(13.3779, 10.2409, 47.7165)
Luminance	0.1024 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3751BA #BAA037

analogous

#3792BA #3751BA #5F37BA

triadic

#3751BA #BA3751 #51BA37

tetradic

#3751BA #BA3792 #BAA037 #37BA5F

square

#3751BA #BA3792 #BAA037 #37BA5F

split-complementary

#3751BA #BA5F37 #92BA37

monochromatic

#1B285C #293C8B #3751BA #5F75D0 #8E9EDE

Accessibility & contrast

On white

6.89

#3751BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#3751BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3751BA

6.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3751BA	#FFFFFF	#000000	##FFFFFF
##3751BA	1.00	6.89	3.05	6.89
#FFFFFF	6.89	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060BE

Deuteranopia (green-blind)

#0054B8

Tritanopia (blue-blind)

#006B7D

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3751ba;
/* rgb */ color: rgb(55, 81, 186);
/* oklch */ color: oklch(47.8% 0.168 268.7);

Tailwind

colors: {
  custom: {
    50: '#7e81cf',
    500: '#3751ba',
    950: '#000000',
  },
}

SCSS

$custom: #3751ba;
$custom-light: #7e81cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3751ba",
  "rgb": {
    "r": 55,
    "g": 81,
    "b": 186
  },
  "hsl": {
    "h": 228.092,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.47773,
    "c": 0.1681,
    "h": 268.7
  },
  "luminance": 0.10242
}

Semantic roles & 50–950 ramp

primary

#3751BA

secondary

#C8BB85

accent

#C04ADE

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3751BA

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

Preview Lab → · Contrast checker → · Palette generator →