#3137A4#3137A4

#3137A4 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.7% C 0.172 H 273.4°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#3137A4
RGB	rgb(49, 55, 164)
HSL	hsl(237, 54%, 42%)
HSV	hsv(237, 70%, 64%)
CMYK	cmyk(70.1%, 66.5%, 0%, 35.7%)
CIE-LAB	lab(29.58, 34.21, -59.45)
CIE-LCH	lch(29.58, 68.60, 299.92°)
OKLab	oklab(40.69% 0.0102 -0.1717)
OKLCH	oklch(40.69% 0.172 273.4)
XYZ	xyz(9.3314, 6.0648, 35.7936)
Luminance	0.0607 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.83

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3137A4 #A49E31

analogous

#3171A4 #3137A4 #6531A4

triadic

#3137A4 #A43137 #37A431

tetradic

#3137A4 #A43171 #A49E31 #31A465

square

#3137A4 #A43171 #A49E31 #31A465

split-complementary

#3137A4 #A46531 #71A431

monochromatic

#151746 #232775 #3137A4 #4950C9 #797DD7

Accessibility & contrast

On white

9.49

#3137A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3137A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137A4

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137A4	#FFFFFF	#000000	##FFFFFF
##3137A4	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA7

Deuteranopia (green-blind)

#0040A2

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3137a4;
/* rgb */ color: rgb(49, 55, 164);
/* oklch */ color: oklch(40.7% 0.172 273.4);

Tailwind

colors: {
  custom: {
    50: '#796ec0',
    500: '#3137a4',
    950: '#000000',
  },
}

SCSS

$custom: #3137a4;
$custom-light: #796ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#3137a4",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 164
  },
  "hsl": {
    "h": 236.87,
    "s": 53.991,
    "l": 41.765
  },
  "oklch": {
    "l": 0.40687,
    "c": 0.17202,
    "h": 273.4
  },
  "luminance": 0.06066
}

Semantic roles & 50–950 ramp

primary

#3137A4

secondary

#BFBB72

accent

#D64ADD

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #3137A4

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

Preview Lab → · Contrast checker → · Palette generator →