#3749D8#3749D8

#3749D8 is a mid, highly saturated blue. Relative luminance 0.105; OKLCH L 48.9% C 0.217 H 270.3°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#3749D8
RGB	rgb(55, 73, 216)
HSL	hsl(233, 67%, 53%)
HSV	hsv(233, 75%, 85%)
CMYK	cmyk(74.5%, 66.2%, 0%, 15.3%)
CIE-LAB	lab(38.78, 41.93, -74.91)
CIE-LCH	lch(38.78, 85.85, 299.24°)
OKLab	oklab(48.92% 0.001 -0.2167)
OKLCH	oklch(48.92% 0.217 270.3)
XYZ	xyz(16.3485, 10.5334, 66.1240)
Luminance	0.1053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.45

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749D8 #D8C637

analogous

#3799D8 #3749D8 #7537D8

triadic

#3749D8 #D83749 #49D837

tetradic

#3749D8 #D83799 #D8C637 #37D875

square

#3749D8 #D83799 #D8C637 #37D875

split-complementary

#3749D8 #D87537 #99D837

monochromatic

#18237C #2232B0 #3749D8 #6A78E2 #9DA6EC

Accessibility & contrast

On white

6.76

#3749D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3749D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3749D8

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749D8	#FFFFFF	#000000	##FFFFFF
##3749D8	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063DC

Deuteranopia (green-blind)

#0054D5

Tritanopia (blue-blind)

#006F8A

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3749d8;
/* rgb */ color: rgb(55, 73, 216);
/* oklch */ color: oklch(48.9% 0.217 270.3);

Tailwind

colors: {
  custom: {
    50: '#867ce5',
    500: '#3749d8',
    950: '#000000',
  },
}

SCSS

$custom: #3749d8;
$custom-light: #867ce5;
$custom-dark: #000000;

JSON

{
  "hex": "#3749d8",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 216
  },
  "hsl": {
    "h": 233.292,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.48917,
    "c": 0.21673,
    "h": 270.3
  },
  "luminance": 0.10535
}

Semantic roles & 50–950 ramp

primary

#3749D8

secondary

#D8D093

accent

#D73EEA

background

#F9F7FE

surface

#F1EEFC

border

#CBC9D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3749D8

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

Preview Lab → · Contrast checker → · Palette generator →