#3151A4#3151A4

#3151A4 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.8% C 0.139 H 265.4°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#3151A4
RGB	rgb(49, 81, 164)
HSL	hsl(223, 54%, 42%)
HSV	hsv(223, 70%, 64%)
CMYK	cmyk(70.1%, 50.6%, 0%, 35.7%)
CIE-LAB	lab(36.40, 17.12, -48.36)
CIE-LCH	lch(36.40, 51.30, 289.49°)
OKLab	oklab(45.78% -0.0112 -0.1388)
OKLCH	oklch(45.78% 0.139 265.4)
XYZ	xyz(10.9075, 9.2171, 36.3190)
Luminance	0.0922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151A4 #A48431

analogous

#318BA4 #3151A4 #4A31A4

triadic

#3151A4 #A43151 #51A431

tetradic

#3151A4 #A4318B #A48431 #31A44A

square

#3151A4 #A4318B #A48431 #31A44A

split-complementary

#3151A4 #A44A31 #8BA431

monochromatic

#152246 #233A75 #3151A4 #496DC9 #7993D7

Accessibility & contrast

On white

7.39

#3151A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#3151A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151A4

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151A4	#FFFFFF	#000000	##FFFFFF
##3151A4	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#215BA7

Deuteranopia (green-blind)

#0051A2

Tritanopia (blue-blind)

#006573

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3151a4;
/* rgb */ color: rgb(49, 81, 164);
/* oklch */ color: oklch(45.8% 0.139 265.4);

Tailwind

colors: {
  custom: {
    50: '#7781bf',
    500: '#3151a4',
    950: '#000000',
  },
}

SCSS

$custom: #3151a4;
$custom-light: #7781bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3151a4",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 164
  },
  "hsl": {
    "h": 223.304,
    "s": 53.991,
    "l": 41.765
  },
  "oklch": {
    "l": 0.45778,
    "c": 0.13926,
    "h": 265.4
  },
  "luminance": 0.09218
}

Semantic roles & 50–950 ramp

primary

#3151A4

secondary

#BFAA72

accent

#B44ADD

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#0A0A12

muted

#7C7C81

Preview Lab

Preview with #3151A4

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

Preview Lab → · Contrast checker → · Palette generator →