#2F40B7#2F40B7

#2F40B7 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.187 H 270.2°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#2F40B7
RGB	rgb(47, 64, 183)
HSL	hsl(233, 59%, 45%)
HSV	hsv(233, 74%, 72%)
CMYK	cmyk(74.3%, 65%, 0%, 28.2%)
CIE-LAB	lab(33.33, 35.04, -64.66)
CIE-LCH	lch(33.33, 73.55, 298.46°)
OKLab	oklab(43.92% 0.0007 -0.187)
OKLCH	oklch(43.92% 0.187 270.2)
XYZ	xyz(11.5500, 7.6888, 45.6659)
Luminance	0.0769 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.54

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F40B7 #B7A62F

analogous

#2F84B7 #2F40B7 #622FB7

triadic

#2F40B7 #B72F40 #40B72F

tetradic

#2F40B7 #B72F84 #B7A62F #2FB762

square

#2F40B7 #B72F84 #B7A62F #2FB762

split-complementary

#2F40B7 #B7622F #84B72F

monochromatic

#161E56 #222F86 #2F40B7 #5161D2 #828DDF

Accessibility & contrast

On white

8.27

#2F40B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#2F40B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F40B7

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F40B7	#FFFFFF	#000000	##FFFFFF
##2F40B7	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#0048B5

Tritanopia (blue-blind)

#005F75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2f40b7;
/* rgb */ color: rgb(47, 64, 183);
/* oklch */ color: oklch(43.9% 0.187 270.2);

Tailwind

colors: {
  custom: {
    50: '#7c75ce',
    500: '#2f40b7',
    950: '#000000',
  },
}

SCSS

$custom: #2f40b7;
$custom-light: #7c75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#2f40b7",
  "rgb": {
    "r": 47,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 232.5,
    "s": 59.13,
    "l": 45.098
  },
  "oklch": {
    "l": 0.4392,
    "c": 0.18696,
    "h": 270.2
  },
  "luminance": 0.0769
}

Semantic roles & 50–950 ramp

primary

#2F40B7

secondary

#C8BE7A

accent

#CF45E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #2F40B7

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

Preview Lab → · Contrast checker → · Palette generator →