#3151AB#3151AB

#3151AB is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.3% C 0.149 H 266.0°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#3151AB
RGB	rgb(49, 81, 171)
HSL	hsl(224, 55%, 43%)
HSV	hsv(224, 71%, 67%)
CMYK	cmyk(71.3%, 52.6%, 0%, 32.9%)
CIE-LAB	lab(36.89, 19.75, -51.74)
CIE-LCH	lch(36.89, 55.39, 290.89°)
OKLab	oklab(46.3% -0.0104 -0.1488)
OKLCH	oklch(46.3% 0.149 266)
XYZ	xyz(11.5572, 9.4769, 39.7403)
Luminance	0.0948 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151AB #AB8B31

analogous

#318EAB #3151AB #4E31AB

triadic

#3151AB #AB3151 #51AB31

tetradic

#3151AB #AB318E #AB8B31 #31AB4E

square

#3151AB #AB318E #AB8B31 #31AB4E

split-complementary

#3151AB #AB4E31 #8EAB31

monochromatic

#16244C #233A7B #3151AB #4D6ECC #7D95DA

Accessibility & contrast

On white

7.25

#3151AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3151AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151AB

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151AB	#FFFFFF	#000000	##FFFFFF
##3151AB	1.00	7.25	2.90	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#165DAE

Deuteranopia (green-blind)

#0051A9

Tritanopia (blue-blind)

#006776

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3151ab;
/* rgb */ color: rgb(49, 81, 171);
/* oklch */ color: oklch(46.3% 0.149 266.0);

Tailwind

colors: {
  custom: {
    50: '#7981c5',
    500: '#3151ab',
    950: '#000000',
  },
}

SCSS

$custom: #3151ab;
$custom-light: #7981c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3151ab",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 171
  },
  "hsl": {
    "h": 224.262,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.46304,
    "c": 0.14914,
    "h": 266
  },
  "luminance": 0.09478
}

Semantic roles & 50–950 ramp

primary

#3151AB

secondary

#C2AE75

accent

#B749DF

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #3151AB

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

Preview Lab → · Contrast checker → · Palette generator →