#3734BC#3734BC

#3734BC is a dark, highly saturated blue. Relative luminance 0.069; OKLCH L 42.9% C 0.204 H 274.5°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#3734BC
RGB	rgb(55, 52, 188)
HSL	hsl(241, 57%, 47%)
HSV	hsv(241, 72%, 74%)
CMYK	cmyk(70.7%, 72.3%, 0%, 26.3%)
CIE-LAB	lab(31.57, 44.92, -70.48)
CIE-LCH	lch(31.57, 83.58, 302.51°)
OKLab	oklab(42.92% 0.016 -0.2038)
OKLCH	oklch(42.92% 0.204 274.5)
XYZ	xyz(11.8776, 6.8979, 48.2727)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.87

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3734BC #B9BC34

analogous

#3475BC #3734BC #7B34BC

triadic

#3734BC #BC3734 #34BC37

tetradic

#3734BC #BC3475 #B9BC34 #34BC7B

square

#3734BC #BC3475 #B9BC34 #34BC7B

split-complementary

#3734BC #BC7B34 #75BC34

monochromatic

#1B195C #29278C #3734BC #5E5BD2 #8D8BDF

Accessibility & contrast

On white

8.82

#3734BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3734BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3734BC

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3734BC	#FFFFFF	#000000	##FFFFFF
##3734BC	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C0

Deuteranopia (green-blind)

#0044BA

Tritanopia (blue-blind)

#005A75

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3734bc;
/* rgb */ color: rgb(55, 52, 188);
/* oklch */ color: oklch(42.9% 0.204 274.5);

Tailwind

colors: {
  custom: {
    50: '#816dd1',
    500: '#3734bc',
    950: '#000000',
  },
}

SCSS

$custom: #3734bc;
$custom-light: #816dd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3734bc",
  "rgb": {
    "r": 55,
    "g": 52,
    "b": 188
  },
  "hsl": {
    "h": 241.324,
    "s": 56.667,
    "l": 47.059
  },
  "oklch": {
    "l": 0.42919,
    "c": 0.20442,
    "h": 274.5
  },
  "luminance": 0.06899
}

Semantic roles & 50–950 ramp

primary

#3734BC

secondary

#C8C983

accent

#E048DD

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3734BC

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

Preview Lab → · Contrast checker → · Palette generator →