#2F51BC#2F51BC

#2F51BC is a mid, vivid blue. Relative luminance 0.101; OKLCH L 47.6% C 0.173 H 266.4°. Best body text is #FFFFFF at 6.94:1 contrast (WCAG AA passes).

Color values

HEX	#2F51BC
RGB	rgb(47, 81, 188)
HSL	hsl(226, 60%, 46%)
HSV	hsv(226, 75%, 74%)
CMYK	cmyk(75%, 56.9%, 0%, 26.3%)
CIE-LAB	lab(38.05, 25.86, -59.88)
CIE-LCH	lch(38.05, 65.23, 293.36°)
OKLab	oklab(47.56% -0.0109 -0.1727)
OKLCH	oklch(47.56% 0.173 266.4)
XYZ	xyz(13.1886, 10.1186, 48.8252)
Luminance	0.1012 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F51BC #BC9A2F

analogous

#2F97BC #2F51BC #532FBC

triadic

#2F51BC #BC2F51 #51BC2F

tetradic

#2F51BC #BC2F97 #BC9A2F #2FBC53

square

#2F51BC #BC2F97 #BC9A2F #2FBC53

split-complementary

#2F51BC #BC532F #97BC2F

monochromatic

#17275A #233C8B #2F51BC #5473D4 #859BE0

Accessibility & contrast

On white

6.94

#2F51BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.02

#2F51BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2F51BC

6.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F51BC	#FFFFFF	#000000	##FFFFFF
##2F51BC	1.00	6.94	3.02	6.94
#FFFFFF	6.94	1.00	21.00	1.00
#000000	3.02	21.00	1.00	21.00
##FFFFFF	6.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060C0

Deuteranopia (green-blind)

#0053BA

Tritanopia (blue-blind)

#006C7E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #2f51bc;
/* rgb */ color: rgb(47, 81, 188);
/* oklch */ color: oklch(47.6% 0.173 266.4);

Tailwind

colors: {
  custom: {
    50: '#7c81d1',
    500: '#2f51bc',
    950: '#000000',
  },
}

SCSS

$custom: #2f51bc;
$custom-light: #7c81d1;
$custom-dark: #000000;

JSON

{
  "hex": "#2f51bc",
  "rgb": {
    "r": 47,
    "g": 81,
    "b": 188
  },
  "hsl": {
    "h": 225.532,
    "s": 60,
    "l": 46.078
  },
  "oklch": {
    "l": 0.47557,
    "c": 0.1731,
    "h": 266.4
  },
  "luminance": 0.1012
}

Semantic roles & 50–950 ramp

primary

#2F51BC

secondary

#CAB77D

accent

#BD45E3

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #2F51BC

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

Preview Lab → · Contrast checker → · Palette generator →