#3741AC#3741AC

#3741AC is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.6% C 0.169 H 273.0°. Best body text is #FFFFFF at 8.35:1 contrast (WCAG AA passes).

Color values

HEX	#3741AC
RGB	rgb(55, 65, 172)
HSL	hsl(235, 52%, 45%)
HSV	hsv(235, 68%, 67%)
CMYK	cmyk(68%, 62.2%, 0%, 32.5%)
CIE-LAB	lab(33.07, 31.48, -58.52)
CIE-LCH	lch(33.07, 66.45, 298.27°)
OKLab	oklab(43.56% 0.009 -0.1688)
OKLCH	oklch(43.56% 0.169 273)
XYZ	xyz(10.9097, 7.5704, 39.9080)
Luminance	0.0757 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.97

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3741AC #ACA237

analogous

#377CAC #3741AC #6837AC

triadic

#3741AC #AC3741 #41AC37

tetradic

#3741AC #AC377C #ACA237 #37AC68

square

#3741AC #AC377C #ACA237 #37AC68

split-complementary

#3741AC #AC6837 #7CAC37

monochromatic

#191E4F #282F7E #3741AC #5761C9 #858CD8

Accessibility & contrast

On white

8.35

#3741AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3741AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741AC

8.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741AC	#FFFFFF	#000000	##FFFFFF
##3741AC	1.00	8.35	2.51	8.35
#FFFFFF	8.35	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053AF

Deuteranopia (green-blind)

#0049AA

Tritanopia (blue-blind)

#005C70

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3741ac;
/* rgb */ color: rgb(55, 65, 172);
/* oklch */ color: oklch(43.6% 0.169 273.0);

Tailwind

colors: {
  custom: {
    50: '#7d75c6',
    500: '#3741ac',
    950: '#000000',
  },
}

SCSS

$custom: #3741ac;
$custom-light: #7d75c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3741ac",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 172
  },
  "hsl": {
    "h": 234.872,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43561,
    "c": 0.16901,
    "h": 273
  },
  "luminance": 0.07571
}

Semantic roles & 50–950 ramp

primary

#3741AC

secondary

#C2BC7D

accent

#CF4DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3741AC

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

Preview Lab → · Contrast checker → · Palette generator →