#3151B0#3151B0

#3151B0 is a mid, vivid blue. Relative luminance 0.097; OKLCH L 46.7% C 0.156 H 266.3°. Best body text is #FFFFFF at 7.16:1 contrast (WCAG AA passes).

Color values

HEX	#3151B0
RGB	rgb(49, 81, 176)
HSL	hsl(225, 56%, 44%)
HSV	hsv(225, 72%, 69%)
CMYK	cmyk(72.2%, 54%, 0%, 31%)
CIE-LAB	lab(37.25, 21.62, -54.13)
CIE-LCH	lch(37.25, 58.29, 291.78°)
OKLab	oklab(46.69% -0.01 -0.1558)
OKLCH	oklch(46.69% 0.156 266.3)
XYZ	xyz(12.0428, 9.6712, 42.2979)
Luminance	0.0967 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151B0 #B09031

analogous

#3191B0 #3151B0 #5131B0

triadic

#3151B0 #B03151 #51B031

tetradic

#3151B0 #B03191 #B09031 #31B051

square

#3151B0 #B03191 #B09031 #31B051

split-complementary

#3151B0 #B05131 #91B031

monochromatic

#162550 #243B80 #3151B0 #5070CE #8097DC

Accessibility & contrast

On white

7.16

#3151B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.93

#3151B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151B0

7.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151B0	#FFFFFF	#000000	##FFFFFF
##3151B0	1.00	7.16	2.93	7.16
#FFFFFF	7.16	1.00	21.00	1.00
#000000	2.93	21.00	1.00	21.00
##FFFFFF	7.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#085EB3

Deuteranopia (green-blind)

#0052AE

Tritanopia (blue-blind)

#006878

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3151b0;
/* rgb */ color: rgb(49, 81, 176);
/* oklch */ color: oklch(46.7% 0.156 266.3);

Tailwind

colors: {
  custom: {
    50: '#7a81c8',
    500: '#3151b0',
    950: '#000000',
  },
}

SCSS

$custom: #3151b0;
$custom-light: #7a81c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3151b0",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 176
  },
  "hsl": {
    "h": 224.882,
    "s": 56.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.46689,
    "c": 0.15611,
    "h": 266.3
  },
  "luminance": 0.09672
}

Semantic roles & 50–950 ramp

primary

#3151B0

secondary

#C5B178

accent

#BA48E0

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #3151B0

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

Preview Lab → · Contrast checker → · Palette generator →