#3339B0#3339B0

#3339B0 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.3% C 0.185 H 273.1°. Best body text is #FFFFFF at 8.92:1 contrast (WCAG AA passes).

Color values

HEX	#3339B0
RGB	rgb(51, 57, 176)
HSL	hsl(237, 55%, 45%)
HSV	hsv(237, 71%, 69%)
CMYK	cmyk(71%, 67.6%, 0%, 31%)
CIE-LAB	lab(31.26, 37.42, -63.88)
CIE-LCH	lch(31.26, 74.04, 300.36°)
OKLab	oklab(42.28% 0.01 -0.1846)
OKLCH	oklch(42.28% 0.185 273.1)
XYZ	xyz(10.6622, 6.7636, 41.8095)
Luminance	0.0677 (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

#3339B0 #B0AA33

analogous

#3378B0 #3339B0 #6C33B0

triadic

#3339B0 #B03339 #39B033

tetradic

#3339B0 #B03378 #B0AA33 #33B06C

square

#3339B0 #B03378 #B0AA33 #33B06C

split-complementary

#3339B0 #B06C33 #78B033

monochromatic

#181A51 #252A81 #3339B0 #5359CD #8287DB

Accessibility & contrast

On white

8.92

#3339B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3339B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3339B0

8.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3339B0	#FFFFFF	#000000	##FFFFFF
##3339B0	1.00	8.92	2.35	8.92
#FFFFFF	8.92	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB4

Deuteranopia (green-blind)

#0044AE

Tritanopia (blue-blind)

#00596F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3339b0;
/* rgb */ color: rgb(51, 57, 176);
/* oklch */ color: oklch(42.3% 0.185 273.1);

Tailwind

colors: {
  custom: {
    50: '#7c70c9',
    500: '#3339b0',
    950: '#000000',
  },
}

SCSS

$custom: #3339b0;
$custom-light: #7c70c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3339b0",
  "rgb": {
    "r": 51,
    "g": 57,
    "b": 176
  },
  "hsl": {
    "h": 237.12,
    "s": 55.066,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42281,
    "c": 0.18489,
    "h": 273.1
  },
  "luminance": 0.06765
}

Semantic roles & 50–950 ramp

primary

#3339B0

secondary

#C4C17B

accent

#D749DE

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3339B0

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

Preview Lab → · Contrast checker → · Palette generator →