#2F40B5#2F40B5

#2F40B5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.184 H 270.2°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#2F40B5
RGB	rgb(47, 64, 181)
HSL	hsl(232, 59%, 45%)
HSV	hsv(232, 74%, 71%)
CMYK	cmyk(74%, 64.6%, 0%, 29%)
CIE-LAB	lab(33.15, 34.32, -63.77)
CIE-LCH	lch(33.15, 72.42, 298.29°)
OKLab	oklab(43.74% 0.0008 -0.1844)
OKLCH	oklch(43.74% 0.184 270.2)
XYZ	xyz(11.3433, 7.6061, 44.5774)
Luminance	0.0761 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F40B5 #B5A42F

analogous

#2F83B5 #2F40B5 #612FB5

triadic

#2F40B5 #B52F40 #40B52F

tetradic

#2F40B5 #B52F83 #B5A42F #2FB561

square

#2F40B5 #B52F83 #B5A42F #2FB561

split-complementary

#2F40B5 #B5612F #83B52F

monochromatic

#161E54 #222F84 #2F40B5 #5060D1 #808CDE

Accessibility & contrast

On white

8.33

#2F40B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#2F40B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F40B5

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F40B5	#FFFFFF	#000000	##FFFFFF
##2F40B5	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2f40b5;
/* rgb */ color: rgb(47, 64, 181);
/* oklch */ color: oklch(43.7% 0.184 270.2);

Tailwind

colors: {
  custom: {
    50: '#7b75cc',
    500: '#2f40b5',
    950: '#000000',
  },
}

SCSS

$custom: #2f40b5;
$custom-light: #7b75cc;
$custom-dark: #000000;

JSON

{
  "hex": "#2f40b5",
  "rgb": {
    "r": 47,
    "g": 64,
    "b": 181
  },
  "hsl": {
    "h": 232.388,
    "s": 58.772,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43736,
    "c": 0.18435,
    "h": 270.2
  },
  "luminance": 0.07607
}

Semantic roles & 50–950 ramp

primary

#2F40B5

secondary

#C7BD79

accent

#CE46E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2F40B5

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

Preview Lab → · Contrast checker → · Palette generator →