#2F51B5#2F51B5

#2F51B5 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.0% C 0.164 H 266.0°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#2F51B5
RGB	rgb(47, 81, 181)
HSL	hsl(225, 59%, 45%)
HSV	hsv(225, 74%, 71%)
CMYK	cmyk(74%, 55.2%, 0%, 29%)
CIE-LAB	lab(37.52, 23.23, -56.63)
CIE-LCH	lch(37.52, 61.21, 292.31°)
OKLab	oklab(46.99% -0.0114 -0.1632)
OKLCH	oklch(46.99% 0.164 266)
XYZ	xyz(12.4523, 9.8241, 44.9471)
Luminance	0.0983 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F51B5 #B5932F

analogous

#2F94B5 #2F51B5 #502FB5

triadic

#2F51B5 #B52F51 #51B52F

tetradic

#2F51B5 #B52F94 #B5932F #2FB550

square

#2F51B5 #B52F94 #B5932F #2FB550

split-complementary

#2F51B5 #B5502F #94B52F

monochromatic

#162654 #223B84 #2F51B5 #5071D1 #8098DE

Accessibility & contrast

On white

7.08

#2F51B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#2F51B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F51B5

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F51B5	#FFFFFF	#000000	##FFFFFF
##2F51B5	1.00	7.08	2.97	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FB8

Deuteranopia (green-blind)

#0052B3

Tritanopia (blue-blind)

#00697B

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #2f51b5;
/* rgb */ color: rgb(47, 81, 181);
/* oklch */ color: oklch(47.0% 0.164 266.0);

Tailwind

colors: {
  custom: {
    50: '#7a81cc',
    500: '#2f51b5',
    950: '#000000',
  },
}

SCSS

$custom: #2f51b5;
$custom-light: #7a81cc;
$custom-dark: #000000;

JSON

{
  "hex": "#2f51b5",
  "rgb": {
    "r": 47,
    "g": 81,
    "b": 181
  },
  "hsl": {
    "h": 224.776,
    "s": 58.772,
    "l": 44.706
  },
  "oklch": {
    "l": 0.46992,
    "c": 0.16358,
    "h": 266
  },
  "luminance": 0.09825
}

Semantic roles & 50–950 ramp

primary

#2F51B5

secondary

#C7B379

accent

#BA46E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #2F51B5

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

Preview Lab → · Contrast checker → · Palette generator →