#3137B2#3137B2

#3137B2 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.0% C 0.190 H 272.6°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#3137B2
RGB	rgb(49, 55, 178)
HSL	hsl(237, 57%, 45%)
HSV	hsv(237, 72%, 70%)
CMYK	cmyk(72.5%, 69.1%, 0%, 30.2%)
CIE-LAB	lab(30.88, 39.12, -65.71)
CIE-LCH	lch(30.88, 76.48, 300.77°)
OKLab	oklab(42.03% 0.0087 -0.19)
OKLCH	oklch(42.03% 0.19 272.6)
XYZ	xyz(10.6660, 6.5986, 42.8224)
Luminance	0.0660 (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

#3137B2 #B2AC31

analogous

#3178B2 #3137B2 #6B31B2

triadic

#3137B2 #B23137 #37B231

tetradic

#3137B2 #B23178 #B2AC31 #31B26B

square

#3137B2 #B23178 #B2AC31 #31B26B

split-complementary

#3137B2 #B26B31 #78B231

monochromatic

#171952 #242882 #3137B2 #5157CF #8185DC

Accessibility & contrast

On white

9.05

#3137B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3137B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137B2

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137B2	#FFFFFF	#000000	##FFFFFF
##3137B2	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)

#004FB6

Deuteranopia (green-blind)

#0043B0

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3137b2;
/* rgb */ color: rgb(49, 55, 178);
/* oklch */ color: oklch(42.0% 0.190 272.6);

Tailwind

colors: {
  custom: {
    50: '#7c6eca',
    500: '#3137b2',
    950: '#000000',
  },
}

SCSS

$custom: #3137b2;
$custom-light: #7c6eca;
$custom-dark: #000000;

JSON

{
  "hex": "#3137b2",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 178
  },
  "hsl": {
    "h": 237.209,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42026,
    "c": 0.19023,
    "h": 272.6
  },
  "luminance": 0.066
}

Semantic roles & 50–950 ramp

primary

#3137B2

secondary

#C5C279

accent

#D948E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3137B2

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

Preview Lab → · Contrast checker → · Palette generator →