#3738CC#3738CC

#3738CC is a mid, highly saturated blue. Relative luminance 0.080; OKLCH L 45.1% C 0.220 H 272.9°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#3738CC
RGB	rgb(55, 56, 204)
HSL	hsl(240, 59%, 51%)
HSV	hsv(240, 73%, 80%)
CMYK	cmyk(73%, 72.5%, 0%, 20%)
CIE-LAB	lab(33.98, 47.90, -75.89)
CIE-LCH	lch(33.98, 89.74, 302.26°)
OKLab	oklab(45.11% 0.0113 -0.2196)
OKLCH	oklch(45.11% 0.22 272.9)
XYZ	xyz(13.8852, 7.9988, 57.9272)
Luminance	0.0800 (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

#3738CC #CCCB37

analogous

#3782CC #3738CC #8037CC

triadic

#3738CC #CC3738 #38CC37

tetradic

#3738CC #CC3782 #CCCB37 #37CC80

square

#3738CC #CC3782 #CCCB37 #37CC80

split-complementary

#3738CC #CC8037 #82CC37

monochromatic

#1C1C6D #28299E #3738CC #6869D8 #9999E5

Accessibility & contrast

On white

8.08

#3738CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3738CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738CC

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738CC	#FFFFFF	#000000	##FFFFFF
##3738CC	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057D0

Deuteranopia (green-blind)

#0049C9

Tritanopia (blue-blind)

#00627F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3738cc;
/* rgb */ color: rgb(55, 56, 204);
/* oklch */ color: oklch(45.1% 0.220 272.9);

Tailwind

colors: {
  custom: {
    50: '#8470dd',
    500: '#3738cc',
    950: '#000000',
  },
}

SCSS

$custom: #3738cc;
$custom-light: #8470dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3738cc",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 204
  },
  "hsl": {
    "h": 239.597,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.45112,
    "c": 0.21985,
    "h": 272.9
  },
  "luminance": 0.08
}

Semantic roles & 50–950 ramp

primary

#3738CC

secondary

#D0D08E

accent

#E145E3

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #3738CC

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

Preview Lab → · Contrast checker → · Palette generator →