#2F40B3#2F40B3

#2F40B3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.182 H 270.3°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#2F40B3
RGB	rgb(47, 64, 179)
HSL	hsl(232, 58%, 44%)
HSV	hsv(232, 74%, 70%)
CMYK	cmyk(73.7%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(32.97, 33.60, -62.87)
CIE-LCH	lch(32.97, 71.29, 298.12°)
OKLab	oklab(43.55% 0.0009 -0.1817)
OKLCH	oklch(43.55% 0.182 270.3)
XYZ	xyz(11.1396, 7.5246, 43.5044)
Luminance	0.0753 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F40B3 #B3A22F

analogous

#2F82B3 #2F40B3 #602FB3

triadic

#2F40B3 #B32F40 #40B32F

tetradic

#2F40B3 #B32F82 #B3A22F #2FB360

square

#2F40B3 #B32F82 #B3A22F #2FB360

split-complementary

#2F40B3 #B3602F #82B32F

monochromatic

#161D52 #222F83 #2F40B3 #4F5FD1 #7F8BDD

Accessibility & contrast

On white

8.38

#2F40B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#2F40B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F40B3

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F40B3	#FFFFFF	#000000	##FFFFFF
##2F40B3	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2f40b3;
/* rgb */ color: rgb(47, 64, 179);
/* oklch */ color: oklch(43.6% 0.182 270.3);

Tailwind

colors: {
  custom: {
    50: '#7b75cb',
    500: '#2f40b3',
    950: '#000000',
  },
}

SCSS

$custom: #2f40b3;
$custom-light: #7b75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2f40b3",
  "rgb": {
    "r": 47,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 232.273,
    "s": 58.407,
    "l": 44.314
  },
  "oklch": {
    "l": 0.43552,
    "c": 0.18172,
    "h": 270.3
  },
  "luminance": 0.07526
}

Semantic roles & 50–950 ramp

primary

#2F40B3

secondary

#C6BC78

accent

#CE46E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2F40B3

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

Preview Lab → · Contrast checker → · Palette generator →