#2F40B8#2F40B8

#2F40B8 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.188 H 270.2°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#2F40B8
RGB	rgb(47, 64, 184)
HSL	hsl(233, 59%, 45%)
HSV	hsv(233, 74%, 72%)
CMYK	cmyk(74.5%, 65.2%, 0%, 27.8%)
CIE-LAB	lab(33.42, 35.40, -65.11)
CIE-LCH	lch(33.42, 74.11, 298.54°)
OKLab	oklab(44.01% 0.0006 -0.1883)
OKLCH	oklch(44.01% 0.188 270.2)
XYZ	xyz(11.6545, 7.7306, 46.2160)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.46

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F40B8 #B8A72F

analogous

#2F84B8 #2F40B8 #632FB8

triadic

#2F40B8 #B82F40 #40B82F

tetradic

#2F40B8 #B82F84 #B8A72F #2FB863

square

#2F40B8 #B82F84 #B8A72F #2FB863

split-complementary

#2F40B8 #B8632F #84B82F

monochromatic

#161E57 #232F87 #2F40B8 #5262D3 #828EDF

Accessibility & contrast

On white

8.25

#2F40B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#2F40B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F40B8

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F40B8	#FFFFFF	#000000	##FFFFFF
##2F40B8	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#0048B6

Tritanopia (blue-blind)

#006076

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #2f40b8;
/* rgb */ color: rgb(47, 64, 184);
/* oklch */ color: oklch(44.0% 0.188 270.2);

Tailwind

colors: {
  custom: {
    50: '#7c75ce',
    500: '#2f40b8',
    950: '#000000',
  },
}

SCSS

$custom: #2f40b8;
$custom-light: #7c75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#2f40b8",
  "rgb": {
    "r": 47,
    "g": 64,
    "b": 184
  },
  "hsl": {
    "h": 232.555,
    "s": 59.307,
    "l": 45.294
  },
  "oklch": {
    "l": 0.44013,
    "c": 0.18826,
    "h": 270.2
  },
  "luminance": 0.07732
}

Semantic roles & 50–950 ramp

primary

#2F40B8

secondary

#C8BF7B

accent

#CF45E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #2F40B8

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

Preview Lab → · Contrast checker → · Palette generator →