#3151B1#3151B1

#3151B1 is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.8% C 0.157 H 266.4°. Best body text is #FFFFFF at 7.14:1 contrast (WCAG AA passes).

Color values

HEX	#3151B1
RGB	rgb(49, 81, 177)
HSL	hsl(225, 57%, 44%)
HSV	hsv(225, 72%, 69%)
CMYK	cmyk(72.3%, 54.2%, 0%, 30.6%)
CIE-LAB	lab(37.32, 22.00, -54.60)
CIE-LCH	lch(37.32, 58.87, 291.94°)
OKLab	oklab(46.77% -0.0099 -0.1572)
OKLCH	oklch(46.77% 0.157 266.4)
XYZ	xyz(12.1421, 9.7109, 42.8209)
Luminance	0.0971 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B1 #B19131

analogous

#3191B1 #3151B1 #5131B1

triadic

#3151B1 #B13151 #51B131

tetradic

#3151B1 #B13191 #B19131 #31B151

square

#3151B1 #B13191 #B19131 #31B151

split-complementary

#3151B1 #B15131 #91B131

monochromatic

#162551 #243B81 #3151B1 #5170CF #8097DC

Accessibility & contrast

On white

7.14

#3151B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#3151B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B1

7.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B1	#FFFFFF	#000000	##FFFFFF
##3151B1	1.00	7.14	2.94	7.14
#FFFFFF	7.14	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#045EB4

Deuteranopia (green-blind)

#0052AF

Tritanopia (blue-blind)

#006879

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3151b1;
/* rgb */ color: rgb(49, 81, 177);
/* oklch */ color: oklch(46.8% 0.157 266.4);

Tailwind

colors: {
  custom: {
    50: '#7a81c9',
    500: '#3151b1',
    950: '#000000',
  },
}

SCSS

$custom: #3151b1;
$custom-light: #7a81c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b1",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 177
  },
  "hsl": {
    "h": 225,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.46768,
    "c": 0.15749,
    "h": 266.4
  },
  "luminance": 0.09712
}

Semantic roles & 50–950 ramp

primary

#3151B1

secondary

#C5B279

accent

#BA48E0

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #3151B1

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

Preview Lab → · Contrast checker → · Palette generator →