#3739C3#3739C3

#3739C3 is a dark, highly saturated blue. Relative luminance 0.077; OKLCH L 44.4% C 0.208 H 273.4°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#3739C3
RGB	rgb(55, 57, 195)
HSL	hsl(239, 56%, 49%)
HSV	hsv(239, 72%, 76%)
CMYK	cmyk(71.8%, 70.8%, 0%, 23.5%)
CIE-LAB	lab(33.30, 44.35, -71.75)
CIE-LCH	lch(33.30, 84.35, 301.72°)
OKLab	oklab(44.36% 0.0122 -0.2075)
OKLCH	oklch(44.36% 0.208 273.4)
XYZ	xyz(12.8857, 7.6773, 52.4220)
Luminance	0.0768 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.33

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3739C3 #C3C137

analogous

#377FC3 #3739C3 #7B37C3

triadic

#3739C3 #C33739 #39C337

tetradic

#3739C3 #C3377F #C3C137 #37C37B

square

#3739C3 #C3377F #C3C137 #37C37B

split-complementary

#3739C3 #C37B37 #7FC337

monochromatic

#1C1D64 #2A2B93 #3739C3 #6466D3 #9495E1

Accessibility & contrast

On white

8.28

#3739C3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3739C3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739C3

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3739C3	#FFFFFF	#000000	##FFFFFF
##3739C3	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055C7

Deuteranopia (green-blind)

#0048C0

Tritanopia (blue-blind)

#005F7A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3739c3;
/* rgb */ color: rgb(55, 57, 195);
/* oklch */ color: oklch(44.4% 0.208 273.4);

Tailwind

colors: {
  custom: {
    50: '#8270d6',
    500: '#3739c3',
    950: '#000000',
  },
}

SCSS

$custom: #3739c3;
$custom-light: #8270d6;
$custom-dark: #000000;

JSON

{
  "hex": "#3739c3",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 195
  },
  "hsl": {
    "h": 239.143,
    "s": 56,
    "l": 49.02
  },
  "oklch": {
    "l": 0.44361,
    "c": 0.20787,
    "h": 273.4
  },
  "luminance": 0.07679
}

Semantic roles & 50–950 ramp

primary

#3739C3

secondary

#CCCB8A

accent

#DD49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3739C3

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

Preview Lab → · Contrast checker → · Palette generator →