#3157AB#3157AB

#3157AB is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.6% C 0.142 H 263.6°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#3157AB
RGB	rgb(49, 87, 171)
HSL	hsl(221, 55%, 43%)
HSV	hsv(221, 71%, 67%)
CMYK	cmyk(71.3%, 49.1%, 0%, 32.9%)
CIE-LAB	lab(38.57, 15.80, -49.04)
CIE-LCH	lch(38.57, 51.52, 287.85°)
OKLab	oklab(47.58% -0.0157 -0.1407)
OKLCH	oklch(47.58% 0.142 263.6)
XYZ	xyz(12.0229, 10.4084, 39.8956)
Luminance	0.1041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3157AB #AB8531

analogous

#3194AB #3157AB #4831AB

triadic

#3157AB #AB3157 #57AB31

tetradic

#3157AB #AB3194 #AB8531 #31AB48

square

#3157AB #AB3194 #AB8531 #31AB48

split-complementary

#3157AB #AB4831 #94AB31

monochromatic

#16274C #233F7B #3157AB #4D75CC #7D9ADA

Accessibility & contrast

On white

6.81

#3157AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#3157AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3157AB

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3157AB	#FFFFFF	#000000	##FFFFFF
##3157AB	1.00	6.81	3.08	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2861AE

Deuteranopia (green-blind)

#0256A9

Tritanopia (blue-blind)

#006B79

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3157ab;
/* rgb */ color: rgb(49, 87, 171);
/* oklch */ color: oklch(47.6% 0.142 263.6);

Tailwind

colors: {
  custom: {
    50: '#7885c4',
    500: '#3157ab',
    950: '#000000',
  },
}

SCSS

$custom: #3157ab;
$custom-light: #7885c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3157ab",
  "rgb": {
    "r": 49,
    "g": 87,
    "b": 171
  },
  "hsl": {
    "h": 221.311,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.47582,
    "c": 0.14158,
    "h": 263.6
  },
  "luminance": 0.1041
}

Semantic roles & 50–950 ramp

primary

#3157AB

secondary

#C2AA75

accent

#B049DF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #3157AB

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

Preview Lab → · Contrast checker → · Palette generator →