#3749DA#3749DA

#3749DA is a mid, highly saturated blue. Relative luminance 0.106; OKLCH L 49.1% C 0.219 H 270.2°. Best body text is #FFFFFF at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#3749DA
RGB	rgb(55, 73, 218)
HSL	hsl(233, 69%, 54%)
HSV	hsv(233, 75%, 85%)
CMYK	cmyk(74.8%, 66.5%, 0%, 14.5%)
CIE-LAB	lab(38.96, 42.62, -75.77)
CIE-LCH	lch(38.96, 86.93, 299.36°)
OKLab	oklab(49.1% 0.0008 -0.2192)
OKLCH	oklch(49.1% 0.219 270.2)
XYZ	xyz(16.6087, 10.6375, 67.4940)
Luminance	0.1064 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.51

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749DA #DAC837

analogous

#379ADA #3749DA #7637DA

triadic

#3749DA #DA3749 #49DA37

tetradic

#3749DA #DA379A #DAC837 #37DA76

square

#3749DA #DA379A #DAC837 #37DA76

split-complementary

#3749DA #DA7637 #9ADA37

monochromatic

#18237F #2131B3 #3749DA #6B78E4 #9EA7ED

Accessibility & contrast

On white

6.71

#3749DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#3749DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3749DA

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749DA	#FFFFFF	#000000	##FFFFFF
##3749DA	1.00	6.71	3.13	6.71
#FFFFFF	6.71	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064DF

Deuteranopia (green-blind)

#0054D7

Tritanopia (blue-blind)

#00708B

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3749da;
/* rgb */ color: rgb(55, 73, 218);
/* oklch */ color: oklch(49.1% 0.219 270.2);

Tailwind

colors: {
  custom: {
    50: '#867ce7',
    500: '#3749da',
    950: '#000000',
  },
}

SCSS

$custom: #3749da;
$custom-light: #867ce7;
$custom-dark: #000000;

JSON

{
  "hex": "#3749da",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 218
  },
  "hsl": {
    "h": 233.374,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.49103,
    "c": 0.21922,
    "h": 270.2
  },
  "luminance": 0.10639
}

Semantic roles & 50–950 ramp

primary

#3749DA

secondary

#D9D293

accent

#D83CEC

background

#F9F7FE

surface

#F1EEFD

border

#CBC9D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3749DA

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

Preview Lab → · Contrast checker → · Palette generator →