#3739C1#3739C1

#3739C1 is a dark, highly saturated blue. Relative luminance 0.076; OKLCH L 44.2% C 0.205 H 273.5°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#3739C1
RGB	rgb(55, 57, 193)
HSL	hsl(239, 56%, 49%)
HSV	hsv(239, 72%, 76%)
CMYK	cmyk(71.5%, 70.5%, 0%, 24.3%)
CIE-LAB	lab(33.11, 43.68, -70.89)
CIE-LCH	lch(33.11, 83.27, 301.64°)
OKLab	oklab(44.16% 0.0124 -0.205)
OKLCH	oklch(44.16% 0.205 273.5)
XYZ	xyz(12.6611, 7.5875, 51.2390)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.35

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3739C1 #C1BF37

analogous

#377EC1 #3739C1 #7A37C1

triadic

#3739C1 #C13739 #39C137

tetradic

#3739C1 #C1377E #C1BF37 #37C17A

square

#3739C1 #C1377E #C1BF37 #37C17A

split-complementary

#3739C1 #C17A37 #7EC137

monochromatic

#1C1D62 #292B91 #3739C1 #6364D2 #9293E0

Accessibility & contrast

On white

8.34

#3739C1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#3739C1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739C1

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739C1	#FFFFFF	#000000	##FFFFFF
##3739C1	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C5

Deuteranopia (green-blind)

#0047BF

Tritanopia (blue-blind)

#005F79

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3739c1;
/* rgb */ color: rgb(55, 57, 193);
/* oklch */ color: oklch(44.2% 0.205 273.5);

Tailwind

colors: {
  custom: {
    50: '#8270d5',
    500: '#3739c1',
    950: '#000000',
  },
}

SCSS

$custom: #3739c1;
$custom-light: #8270d5;
$custom-dark: #000000;

JSON

{
  "hex": "#3739c1",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 193
  },
  "hsl": {
    "h": 239.13,
    "s": 55.645,
    "l": 48.627
  },
  "oklch": {
    "l": 0.44164,
    "c": 0.20539,
    "h": 273.5
  },
  "luminance": 0.07589
}

Semantic roles & 50–950 ramp

primary

#3739C1

secondary

#CBCA89

accent

#DD49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3739C1

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

Preview Lab → · Contrast checker → · Palette generator →