#3749AC#3749AC

#3749AC is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.1% C 0.159 H 270.8°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#3749AC
RGB	rgb(55, 73, 172)
HSL	hsl(231, 52%, 45%)
HSV	hsv(231, 68%, 67%)
CMYK	cmyk(68%, 57.6%, 0%, 32.5%)
CIE-LAB	lab(35.11, 26.28, -55.20)
CIE-LCH	lch(35.11, 61.14, 295.46°)
OKLab	oklab(45.08% 0.0023 -0.1589)
OKLCH	oklch(45.08% 0.159 270.8)
XYZ	xyz(11.4020, 8.5548, 40.0721)
Luminance	0.0856 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749AC #AC9A37

analogous

#3784AC #3749AC #5F37AC

triadic

#3749AC #AC3749 #49AC37

tetradic

#3749AC #AC3784 #AC9A37 #37AC5F

square

#3749AC #AC3784 #AC9A37 #37AC5F

split-complementary

#3749AC #AC5F37 #84AC37

monochromatic

#19224F #28357E #3749AC #5769C9 #8592D8

Accessibility & contrast

On white

7.75

#3749AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#3749AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749AC

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749AC	#FFFFFF	#000000	##FFFFFF
##3749AC	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058AF

Deuteranopia (green-blind)

#004DAA

Tritanopia (blue-blind)

#006173

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3749ac;
/* rgb */ color: rgb(55, 73, 172);
/* oklch */ color: oklch(45.1% 0.159 270.8);

Tailwind

colors: {
  custom: {
    50: '#7c7bc5',
    500: '#3749ac',
    950: '#000000',
  },
}

SCSS

$custom: #3749ac;
$custom-light: #7c7bc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3749ac",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 172
  },
  "hsl": {
    "h": 230.769,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.45075,
    "c": 0.15894,
    "h": 270.8
  },
  "luminance": 0.08556
}

Semantic roles & 50–950 ramp

primary

#3749AC

secondary

#C2B77D

accent

#C54DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3749AC

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

Preview Lab → · Contrast checker → · Palette generator →