#3151AC#3151AC

#3151AC is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.4% C 0.151 H 266.1°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#3151AC
RGB	rgb(49, 81, 172)
HSL	hsl(224, 56%, 43%)
HSV	hsv(224, 72%, 67%)
CMYK	cmyk(71.5%, 52.9%, 0%, 32.5%)
CIE-LAB	lab(36.96, 20.12, -52.22)
CIE-LCH	lch(36.96, 55.97, 291.07°)
OKLab	oklab(46.38% -0.0103 -0.1502)
OKLCH	oklch(46.38% 0.151 266.1)
XYZ	xyz(11.6528, 9.5152, 40.2442)
Luminance	0.0952 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3151AC #AC8C31

analogous

#318EAC #3151AC #4E31AC

triadic

#3151AC #AC3151 #51AC31

tetradic

#3151AC #AC318E #AC8C31 #31AC4E

square

#3151AC #AC318E #AC8C31 #31AC4E

split-complementary

#3151AC #AC4E31 #8EAC31

monochromatic

#16244D #233B7C #3151AC #4E6FCC #7D95DA

Accessibility & contrast

On white

7.23

#3151AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3151AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3151AC

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3151AC	#FFFFFF	#000000	##FFFFFF
##3151AC	1.00	7.23	2.90	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#145DAF

Deuteranopia (green-blind)

#0052AA

Tritanopia (blue-blind)

#006776

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3151ac;
/* rgb */ color: rgb(49, 81, 172);
/* oklch */ color: oklch(46.4% 0.151 266.1);

Tailwind

colors: {
  custom: {
    50: '#7981c5',
    500: '#3151ac',
    950: '#000000',
  },
}

SCSS

$custom: #3151ac;
$custom-light: #7981c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3151ac",
  "rgb": {
    "r": 49,
    "g": 81,
    "b": 172
  },
  "hsl": {
    "h": 224.39,
    "s": 55.656,
    "l": 43.333
  },
  "oklch": {
    "l": 0.4638,
    "c": 0.15054,
    "h": 266.1
  },
  "luminance": 0.09516
}

Semantic roles & 50–950 ramp

primary

#3151AC

secondary

#C3AF76

accent

#B849DF

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #3151AC

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

Preview Lab → · Contrast checker → · Palette generator →