#3738B7#3738B7

#3738B7 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.0% C 0.194 H 274.3°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#3738B7
RGB	rgb(55, 56, 183)
HSL	hsl(240, 54%, 47%)
HSV	hsv(240, 70%, 72%)
CMYK	cmyk(69.9%, 69.4%, 0%, 28.2%)
CIE-LAB	lab(31.94, 40.91, -66.92)
CIE-LCH	lch(31.94, 78.43, 301.44°)
OKLab	oklab(43.04% 0.0144 -0.1934)
OKLCH	oklch(43.04% 0.194 274.3)
XYZ	xyz(11.5341, 7.0584, 45.5451)
Luminance	0.0706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3738B7 #B7B637

analogous

#3778B7 #3738B7 #7637B7

triadic

#3738B7 #B73738 #38B737

tetradic

#3738B7 #B73778 #B7B637 #37B776

square

#3738B7 #B73778 #B7B637 #37B776

split-complementary

#3738B7 #B77637 #78B737

monochromatic

#1B1B59 #292A88 #3738B7 #5D5ECE #8C8DDC

Accessibility & contrast

On white

8.71

#3738B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#3738B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738B7

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738B7	#FFFFFF	#000000	##FFFFFF
##3738B7	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BB

Deuteranopia (green-blind)

#0045B5

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3738b7;
/* rgb */ color: rgb(55, 56, 183);
/* oklch */ color: oklch(43.0% 0.194 274.3);

Tailwind

colors: {
  custom: {
    50: '#806fce',
    500: '#3738b7',
    950: '#000000',
  },
}

SCSS

$custom: #3738b7;
$custom-light: #806fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3738b7",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 183
  },
  "hsl": {
    "h": 239.531,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43035,
    "c": 0.19395,
    "h": 274.3
  },
  "luminance": 0.07059
}

Semantic roles & 50–950 ramp

primary

#3738B7

secondary

#C7C683

accent

#DC4BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3738B7

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

Preview Lab → · Contrast checker → · Palette generator →