#3151AF#3151AF

#3151AF is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.6% C 0.155 H 266.3°. Best body text is #FFFFFF at 7.18:1 contrast (WCAG AA passes).

Color values

HEX	#3151AF
RGB	rgb(49, 81, 175)
HSL	hsl(225, 56%, 44%)
HSV	hsv(225, 72%, 69%)
CMYK	cmyk(72%, 53.7%, 0%, 31.4%)
CIE-LAB	lab(37.17, 21.25, -53.65)
CIE-LCH	lch(37.17, 57.71, 291.61°)
OKLab	oklab(46.61% -0.0101 -0.1544)
OKLCH	oklch(46.61% 0.155 266.3)
XYZ	xyz(11.9442, 9.6317, 41.7788)
Luminance	0.0963 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151AF #AF8F31

analogous

#3190AF #3151AF #5031AF

triadic

#3151AF #AF3151 #51AF31

tetradic

#3151AF #AF3190 #AF8F31 #31AF50

square

#3151AF #AF3190 #AF8F31 #31AF50

split-complementary

#3151AF #AF5031 #90AF31

monochromatic

#16254F #243B7F #3151AF #4F6FCE #7F97DB

Accessibility & contrast

On white

7.18

#3151AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#3151AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151AF

7.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151AF	#FFFFFF	#000000	##FFFFFF
##3151AF	1.00	7.18	2.93	7.18
#FFFFFF	7.18	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B5EB2

Deuteranopia (green-blind)

#0052AD

Tritanopia (blue-blind)

#006878

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3151af;
/* rgb */ color: rgb(49, 81, 175);
/* oklch */ color: oklch(46.6% 0.155 266.3);

Tailwind

colors: {
  custom: {
    50: '#7a81c8',
    500: '#3151af',
    950: '#000000',
  },
}

SCSS

$custom: #3151af;
$custom-light: #7a81c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3151af",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 175
  },
  "hsl": {
    "h": 224.762,
    "s": 56.25,
    "l": 43.922
  },
  "oklch": {
    "l": 0.46612,
    "c": 0.15472,
    "h": 266.3
  },
  "luminance": 0.09633
}

Semantic roles & 50–950 ramp

primary

#3151AF

secondary

#C4B178

accent

#B948E0

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #3151AF

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

Preview Lab → · Contrast checker → · Palette generator →