#3151B3#3151B3

#3151B3 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.9% C 0.160 H 266.5°. Best body text is #FFFFFF at 7.10:1 contrast (WCAG AA passes).

Color values

HEX	#3151B3
RGB	rgb(49, 81, 179)
HSL	hsl(225, 57%, 45%)
HSV	hsv(225, 73%, 70%)
CMYK	cmyk(72.6%, 54.7%, 0%, 29.8%)
CIE-LAB	lab(37.47, 22.75, -55.55)
CIE-LCH	lch(37.47, 60.02, 292.27°)
OKLab	oklab(46.93% -0.0098 -0.16)
OKLCH	oklch(46.93% 0.16 266.5)
XYZ	xyz(12.3429, 9.7912, 43.8785)
Luminance	0.0979 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B3 #B39331

analogous

#3192B3 #3151B3 #5231B3

triadic

#3151B3 #B33151 #51B331

tetradic

#3151B3 #B33192 #B39331 #31B352

square

#3151B3 #B33192 #B39331 #31B352

split-complementary

#3151B3 #B35231 #92B331

monochromatic

#172653 #243B83 #3151B3 #5271D0 #8298DD

Accessibility & contrast

On white

7.10

#3151B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#3151B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B3

7.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B3	#FFFFFF	#000000	##FFFFFF
##3151B3	1.00	7.10	2.96	7.10
#FFFFFF	7.10	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EB6

Deuteranopia (green-blind)

#0052B1

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3151b3;
/* rgb */ color: rgb(49, 81, 179);
/* oklch */ color: oklch(46.9% 0.160 266.5);

Tailwind

colors: {
  custom: {
    50: '#7b81ca',
    500: '#3151b3',
    950: '#000000',
  },
}

SCSS

$custom: #3151b3;
$custom-light: #7b81ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b3",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 179
  },
  "hsl": {
    "h": 225.231,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.46925,
    "c": 0.16026,
    "h": 266.5
  },
  "luminance": 0.09793
}

Semantic roles & 50–950 ramp

primary

#3151B3

secondary

#C6B37A

accent

#BB48E0

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3151B3

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

Preview Lab → · Contrast checker → · Palette generator →