#3151A1#3151A1

#3151A1 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.6% C 0.135 H 265.1°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#3151A1
RGB	rgb(49, 81, 161)
HSL	hsl(223, 53%, 41%)
HSV	hsv(223, 70%, 63%)
CMYK	cmyk(69.6%, 49.7%, 0%, 36.9%)
CIE-LAB	lab(36.20, 15.99, -46.89)
CIE-LCH	lch(36.20, 49.55, 288.83°)
OKLab	oklab(45.56% -0.0116 -0.1345)
OKLCH	oklch(45.56% 0.135 265.1)
XYZ	xyz(10.6398, 9.1100, 34.9090)
Luminance	0.0911 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151A1 #A18131

analogous

#3189A1 #3151A1 #4931A1

triadic

#3151A1 #A13151 #51A131

tetradic

#3151A1 #A13189 #A18131 #31A149

square

#3151A1 #A13189 #A18131 #31A149

split-complementary

#3151A1 #A14931 #89A131

monochromatic

#142243 #233972 #3151A1 #486CC7 #7792D6

Accessibility & contrast

On white

7.44

#3151A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3151A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151A1

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151A1	#FFFFFF	#000000	##FFFFFF
##3151A1	1.00	7.44	2.82	7.44
#FFFFFF	7.44	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#255BA4

Deuteranopia (green-blind)

#03509F

Tritanopia (blue-blind)

#006471

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3151a1;
/* rgb */ color: rgb(49, 81, 161);
/* oklch */ color: oklch(45.6% 0.135 265.1);

Tailwind

colors: {
  custom: {
    50: '#7781bd',
    500: '#3151a1',
    950: '#000000',
  },
}

SCSS

$custom: #3151a1;
$custom-light: #7781bd;
$custom-dark: #000000;

JSON

{
  "hex": "#3151a1",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 161
  },
  "hsl": {
    "h": 222.857,
    "s": 53.333,
    "l": 41.176
  },
  "oklch": {
    "l": 0.45557,
    "c": 0.135,
    "h": 265.1
  },
  "luminance": 0.09111
}

Semantic roles & 50–950 ramp

primary

#3151A1

secondary

#BEA870

accent

#B34BDD

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #3151A1

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

Preview Lab → · Contrast checker → · Palette generator →