#3733B8#3733B8

#3733B8 is a dark, highly saturated blue. Relative luminance 0.066; OKLCH L 42.4% C 0.201 H 274.9°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#3733B8
RGB	rgb(55, 51, 184)
HSL	hsl(242, 57%, 46%)
HSV	hsv(242, 72%, 72%)
CMYK	cmyk(70.1%, 72.3%, 0%, 27.8%)
CIE-LAB	lab(30.97, 44.18, -69.11)
CIE-LCH	lch(30.97, 82.02, 302.59°)
OKLab	oklab(42.37% 0.0173 -0.1998)
OKLCH	oklch(42.37% 0.201 274.9)
XYZ	xyz(11.4082, 6.6395, 46.0184)
Luminance	0.0664 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.66

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3733B8 #B4B833

analogous

#3371B8 #3733B8 #7933B8

triadic

#3733B8 #B83733 #33B837

tetradic

#3733B8 #B83371 #B4B833 #33B879

square

#3733B8 #B83371 #B4B833 #33B879

split-complementary

#3733B8 #B87933 #71B833

monochromatic

#1A1858 #292688 #3733B8 #5B58D1 #8A88DE

Accessibility & contrast

On white

9.02

#3733B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3733B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733B8

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3733B8	#FFFFFF	#000000	##FFFFFF
##3733B8	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBC

Deuteranopia (green-blind)

#0043B6

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3733b8;
/* rgb */ color: rgb(55, 51, 184);
/* oklch */ color: oklch(42.4% 0.201 274.9);

Tailwind

colors: {
  custom: {
    50: '#806ccf',
    500: '#3733b8',
    950: '#000000',
  },
}

SCSS

$custom: #3733b8;
$custom-light: #806ccf;
$custom-dark: #000000;

JSON

{
  "hex": "#3733b8",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 184
  },
  "hsl": {
    "h": 241.805,
    "s": 56.596,
    "l": 46.078
  },
  "oklch": {
    "l": 0.42371,
    "c": 0.20052,
    "h": 274.9
  },
  "luminance": 0.06641
}

Semantic roles & 50–950 ramp

primary

#3733B8

secondary

#C6C87F

accent

#E048DB

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3733B8

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

Preview Lab → · Contrast checker → · Palette generator →