#2F40B1#2F40B1

#2F40B1 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.179 H 270.3°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#2F40B1
RGB	rgb(47, 64, 177)
HSL	hsl(232, 58%, 44%)
HSV	hsv(232, 73%, 69%)
CMYK	cmyk(73.4%, 63.8%, 0%, 30.6%)
CIE-LAB	lab(32.80, 32.87, -61.97)
CIE-LCH	lch(32.80, 70.15, 297.95°)
OKLab	oklab(43.37% 0.001 -0.1791)
OKLCH	oklch(43.37% 0.179 270.3)
XYZ	xyz(10.9388, 7.4443, 42.4469)
Luminance	0.0745 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F40B1 #B1A02F

analogous

#2F81B1 #2F40B1 #5F2FB1

triadic

#2F40B1 #B12F40 #40B12F

tetradic

#2F40B1 #B12F81 #B1A02F #2FB15F

square

#2F40B1 #B12F81 #B1A02F #2FB15F

split-complementary

#2F40B1 #B15F2F #81B12F

monochromatic

#151D50 #222F81 #2F40B1 #4D5ED0 #7E8ADD

Accessibility & contrast

On white

8.44

#2F40B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#2F40B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F40B1

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F40B1	#FFFFFF	#000000	##FFFFFF
##2F40B1	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #2f40b1;
/* rgb */ color: rgb(47, 64, 177);
/* oklch */ color: oklch(43.4% 0.179 270.3);

Tailwind

colors: {
  custom: {
    50: '#7b74c9',
    500: '#2f40b1',
    950: '#000000',
  },
}

SCSS

$custom: #2f40b1;
$custom-light: #7b74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2f40b1",
  "rgb": {
    "r": 47,
    "g": 64,
    "b": 177
  },
  "hsl": {
    "h": 232.154,
    "s": 58.036,
    "l": 43.922
  },
  "oklch": {
    "l": 0.4337,
    "c": 0.17907,
    "h": 270.3
  },
  "luminance": 0.07445
}

Semantic roles & 50–950 ramp

primary

#2F40B1

secondary

#C5BB76

accent

#CD47E1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2F40B1

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

Preview Lab → · Contrast checker → · Palette generator →