#3139BB#3139BB

#3139BB is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.2% C 0.199 H 271.9°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#3139BB
RGB	rgb(49, 57, 187)
HSL	hsl(237, 58%, 46%)
HSV	hsv(237, 74%, 73%)
CMYK	cmyk(73.8%, 69.5%, 0%, 26.7%)
CIE-LAB	lab(32.18, 41.02, -68.90)
CIE-LCH	lch(32.18, 80.19, 300.77°)
OKLab	oklab(43.23% 0.0065 -0.1993)
OKLCH	oklch(43.23% 0.199 271.9)
XYZ	xyz(11.6964, 7.1659, 47.7708)
Luminance	0.0717 (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

#3139BB #BBB331

analogous

#317EBB #3139BB #6E31BB

triadic

#3139BB #BB3139 #39BB31

tetradic

#3139BB #BB317E #BBB331 #31BB6E

square

#3139BB #BB317E #BBB331 #31BB6E

split-complementary

#3139BB #BB6E31 #7EBB31

monochromatic

#181B5A #242A8B #3139BB #565ED3 #878CE0

Accessibility & contrast

On white

8.63

#3139BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3139BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3139BB

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3139BB	#FFFFFF	#000000	##FFFFFF
##3139BB	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0045B9

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3139bb;
/* rgb */ color: rgb(49, 57, 187);
/* oklch */ color: oklch(43.2% 0.199 271.9);

Tailwind

colors: {
  custom: {
    50: '#7e70d1',
    500: '#3139bb',
    950: '#000000',
  },
}

SCSS

$custom: #3139bb;
$custom-light: #7e70d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3139bb",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 187
  },
  "hsl": {
    "h": 236.522,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.4323,
    "c": 0.19944,
    "h": 271.9
  },
  "luminance": 0.07167
}

Semantic roles & 50–950 ramp

primary

#3139BB

secondary

#C9C57F

accent

#D946E2

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3139BB

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

Preview Lab → · Contrast checker → · Palette generator →