#3749CA#3749CA

#3749CA is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.6% C 0.199 H 270.5°. Best body text is #FFFFFF at 7.07:1 contrast (WCAG AA passes).

Color values

HEX	#3749CA
RGB	rgb(55, 73, 202)
HSL	hsl(233, 58%, 50%)
HSV	hsv(233, 73%, 79%)
CMYK	cmyk(72.8%, 63.9%, 0%, 20.8%)
CIE-LAB	lab(37.55, 37.03, -68.85)
CIE-LCH	lch(37.55, 78.18, 298.28°)
OKLab	oklab(47.64% 0.0019 -0.199)
OKLCH	oklch(47.64% 0.199 270.5)
XYZ	xyz(14.6151, 9.8401, 56.9947)
Luminance	0.0984 (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

#3749CA #CAB837

analogous

#3792CA #3749CA #6E37CA

triadic

#3749CA #CA3749 #49CA37

tetradic

#3749CA #CA3792 #CAB837 #37CA6E

square

#3749CA #CA3792 #CAB837 #37CA6E

split-complementary

#3749CA #CA6E37 #92CA37

monochromatic

#1C266A #29379B #3749CA #6775D7 #98A1E4

Accessibility & contrast

On white

7.07

#3749CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#3749CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749CA

7.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749CA	#FFFFFF	#000000	##FFFFFF
##3749CA	1.00	7.07	2.97	7.07
#FFFFFF	7.07	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FCE

Deuteranopia (green-blind)

#0052C8

Tritanopia (blue-blind)

#006B83

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3749ca;
/* rgb */ color: rgb(55, 73, 202);
/* oklch */ color: oklch(47.6% 0.199 270.5);

Tailwind

colors: {
  custom: {
    50: '#827cdb',
    500: '#3749ca',
    950: '#000000',
  },
}

SCSS

$custom: #3749ca;
$custom-light: #827cdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3749ca",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 202
  },
  "hsl": {
    "h": 232.653,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.47642,
    "c": 0.199,
    "h": 270.5
  },
  "luminance": 0.09842
}

Semantic roles & 50–950 ramp

primary

#3749CA

secondary

#CFC78E

accent

#CE46E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3749CA

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

Preview Lab → · Contrast checker → · Palette generator →