#3339AB#3339AB

#3339AB is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.178 H 273.4°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#3339AB
RGB	rgb(51, 57, 171)
HSL	hsl(237, 54%, 44%)
HSV	hsv(237, 70%, 67%)
CMYK	cmyk(70.2%, 66.7%, 0%, 32.9%)
CIE-LAB	lab(30.81, 35.67, -61.64)
CIE-LCH	lch(30.81, 71.22, 300.06°)
OKLab	oklab(41.81% 0.0105 -0.1781)
OKLCH	oklch(41.81% 0.178 273.4)
XYZ	xyz(10.1766, 6.5694, 39.2519)
Luminance	0.0657 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3339AB #ABA533

analogous

#3375AB #3339AB #6933AB

triadic

#3339AB #AB3339 #39AB33

tetradic

#3339AB #AB3375 #ABA533 #33AB69

square

#3339AB #AB3375 #ABA533 #33AB69

split-complementary

#3339AB #AB6933 #75AB33

monochromatic

#171A4D #25297C #3339AB #5056CB #7F84D9

Accessibility & contrast

On white

9.08

#3339AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3339AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3339AB

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3339AB	#FFFFFF	#000000	##FFFFFF
##3339AB	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00576D

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3339ab;
/* rgb */ color: rgb(51, 57, 171);
/* oklch */ color: oklch(41.8% 0.178 273.4);

Tailwind

colors: {
  custom: {
    50: '#7b70c5',
    500: '#3339ab',
    950: '#000000',
  },
}

SCSS

$custom: #3339ab;
$custom-light: #7b70c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3339ab",
  "rgb": {
    "r": 51,
    "g": 57,
    "b": 171
  },
  "hsl": {
    "h": 237,
    "s": 54.054,
    "l": 43.529
  },
  "oklch": {
    "l": 0.4181,
    "c": 0.17838,
    "h": 273.4
  },
  "luminance": 0.0657
}

Semantic roles & 50–950 ramp

primary

#3339AB

secondary

#C2BE78

accent

#D64ADD

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3339AB

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

Preview Lab → · Contrast checker → · Palette generator →