#2F51B7#2F51B7

#2F51B7 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.2% C 0.166 H 266.1°. Best body text is #FFFFFF at 7.04:1 contrast (WCAG AA passes).

Color values

HEX	#2F51B7
RGB	rgb(47, 81, 183)
HSL	hsl(225, 59%, 45%)
HSV	hsv(225, 74%, 72%)
CMYK	cmyk(74.3%, 55.7%, 0%, 28.2%)
CIE-LAB	lab(37.67, 23.99, -57.57)
CIE-LCH	lch(37.67, 62.36, 292.62°)
OKLab	oklab(47.15% -0.0112 -0.1659)
OKLCH	oklch(47.15% 0.166 266.1)
XYZ	xyz(12.6590, 9.9067, 46.0356)
Luminance	0.0991 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F51B7 #B7952F

analogous

#2F95B7 #2F51B7 #512FB7

triadic

#2F51B7 #B72F51 #51B72F

tetradic

#2F51B7 #B72F95 #B7952F #2FB751

square

#2F51B7 #B72F95 #B7952F #2FB751

split-complementary

#2F51B7 #B7512F #95B72F

monochromatic

#162656 #223B86 #2F51B7 #5171D2 #8299DF

Accessibility & contrast

On white

7.04

#2F51B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.98

#2F51B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F51B7

7.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F51B7	#FFFFFF	#000000	##FFFFFF
##2F51B7	1.00	7.04	2.98	7.04
#FFFFFF	7.04	1.00	21.00	1.00
#000000	2.98	21.00	1.00	21.00
##FFFFFF	7.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FBB

Deuteranopia (green-blind)

#0053B5

Tritanopia (blue-blind)

#006A7C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2f51b7;
/* rgb */ color: rgb(47, 81, 183);
/* oklch */ color: oklch(47.2% 0.166 266.1);

Tailwind

colors: {
  custom: {
    50: '#7b81cd',
    500: '#2f51b7',
    950: '#000000',
  },
}

SCSS

$custom: #2f51b7;
$custom-light: #7b81cd;
$custom-dark: #000000;

JSON

{
  "hex": "#2f51b7",
  "rgb": {
    "r": 47,
    "g": 81,
    "b": 183
  },
  "hsl": {
    "h": 225,
    "s": 59.13,
    "l": 45.098
  },
  "oklch": {
    "l": 0.47152,
    "c": 0.16632,
    "h": 266.1
  },
  "luminance": 0.09908
}

Semantic roles & 50–950 ramp

primary

#2F51B7

secondary

#C8B47A

accent

#BB45E2

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #2F51B7

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

Preview Lab → · Contrast checker → · Palette generator →