#3151B2#3151B2

#3151B2 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 46.8% C 0.159 H 266.4°. Best body text is #FFFFFF at 7.12:1 contrast (WCAG AA passes).

Color values

HEX	#3151B2
RGB	rgb(49, 81, 178)
HSL	hsl(225, 57%, 45%)
HSV	hsv(225, 72%, 70%)
CMYK	cmyk(72.5%, 54.5%, 0%, 30.2%)
CIE-LAB	lab(37.39, 22.37, -55.07)
CIE-LCH	lch(37.39, 59.45, 292.11°)
OKLab	oklab(46.85% -0.0098 -0.1586)
OKLCH	oklch(46.85% 0.159 266.4)
XYZ	xyz(12.2421, 9.7509, 43.3478)
Luminance	0.0975 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B2 #B29231

analogous

#3192B2 #3151B2 #5131B2

triadic

#3151B2 #B23151 #51B231

tetradic

#3151B2 #B23192 #B29231 #31B251

square

#3151B2 #B23192 #B29231 #31B251

split-complementary

#3151B2 #B25131 #92B231

monochromatic

#172552 #243B82 #3151B2 #5170CF #8198DC

Accessibility & contrast

On white

7.12

#3151B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#3151B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B2

7.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B2	#FFFFFF	#000000	##FFFFFF
##3151B2	1.00	7.12	2.95	7.12
#FFFFFF	7.12	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EB5

Deuteranopia (green-blind)

#0052B0

Tritanopia (blue-blind)

#006979

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3151b2;
/* rgb */ color: rgb(49, 81, 178);
/* oklch */ color: oklch(46.8% 0.159 266.4);

Tailwind

colors: {
  custom: {
    50: '#7a81ca',
    500: '#3151b2',
    950: '#000000',
  },
}

SCSS

$custom: #3151b2;
$custom-light: #7a81ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b2",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 178
  },
  "hsl": {
    "h": 225.116,
    "s": 56.828,
    "l": 44.51
  },
  "oklch": {
    "l": 0.46846,
    "c": 0.15888,
    "h": 266.4
  },
  "luminance": 0.09752
}

Semantic roles & 50–950 ramp

primary

#3151B2

secondary

#C5B379

accent

#BA48E0

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3151B2

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

Preview Lab → · Contrast checker → · Palette generator →