#3733B7#3733B7

#3733B7 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.3% C 0.199 H 275.0°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#3733B7
RGB	rgb(55, 51, 183)
HSL	hsl(242, 56%, 46%)
HSV	hsv(242, 72%, 72%)
CMYK	cmyk(69.9%, 72.1%, 0%, 28.2%)
CIE-LAB	lab(30.87, 43.85, -68.67)
CIE-LCH	lch(30.87, 81.48, 302.56°)
OKLab	oklab(42.27% 0.0175 -0.1985)
OKLCH	oklch(42.27% 0.199 275)
XYZ	xyz(11.3038, 6.5977, 45.4683)
Luminance	0.0660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.58

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733B7 #B3B733

analogous

#3371B7 #3733B7 #7933B7

triadic

#3733B7 #B73733 #33B737

tetradic

#3733B7 #B73371 #B3B733 #33B779

square

#3733B7 #B73371 #B3B733 #33B779

split-complementary

#3733B7 #B77933 #71B733

monochromatic

#1A1857 #292687 #3733B7 #5B57D0 #8A87DE

Accessibility & contrast

On white

9.05

#3733B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3733B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733B7

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733B7	#FFFFFF	#000000	##FFFFFF
##3733B7	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBB

Deuteranopia (green-blind)

#0043B5

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3733b7;
/* rgb */ color: rgb(55, 51, 183);
/* oklch */ color: oklch(42.3% 0.199 275.0);

Tailwind

colors: {
  custom: {
    50: '#806cce',
    500: '#3733b7',
    950: '#000000',
  },
}

SCSS

$custom: #3733b7;
$custom-light: #806cce;
$custom-dark: #000000;

JSON

{
  "hex": "#3733b7",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 183
  },
  "hsl": {
    "h": 241.818,
    "s": 56.41,
    "l": 45.882
  },
  "oklch": {
    "l": 0.42271,
    "c": 0.19929,
    "h": 275
  },
  "luminance": 0.06599
}

Semantic roles & 50–950 ramp

primary

#3733B7

secondary

#C5C77F

accent

#E048DB

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3733B7

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

Preview Lab → · Contrast checker → · Palette generator →