#2F3FB5#2F3FB5

#2F3FB5 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.186 H 270.4°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#2F3FB5
RGB	rgb(47, 63, 181)
HSL	hsl(233, 59%, 45%)
HSV	hsv(233, 74%, 71%)
CMYK	cmyk(74%, 65.2%, 0%, 29%)
CIE-LAB	lab(32.91, 34.96, -64.16)
CIE-LCH	lch(32.91, 73.07, 298.58°)
OKLab	oklab(43.56% 0.0014 -0.1855)
OKLCH	oklch(43.56% 0.186 270.4)
XYZ	xyz(11.2874, 7.4944, 44.5588)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.61

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F3FB5 #B5A52F

analogous

#2F82B5 #2F3FB5 #622FB5

triadic

#2F3FB5 #B52F3F #3FB52F

tetradic

#2F3FB5 #B52F82 #B5A52F #2FB562

square

#2F3FB5 #B52F82 #B5A52F #2FB562

split-complementary

#2F3FB5 #B5622F #82B52F

monochromatic

#161D54 #222E84 #2F3FB5 #505FD1 #808CDE

Accessibility & contrast

On white

8.40

#2F3FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#2F3FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F3FB5

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F3FB5	#FFFFFF	#000000	##FFFFFF
##2F3FB5	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0047B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #2f3fb5;
/* rgb */ color: rgb(47, 63, 181);
/* oklch */ color: oklch(43.6% 0.186 270.4);

Tailwind

colors: {
  custom: {
    50: '#7c74cc',
    500: '#2f3fb5',
    950: '#000000',
  },
}

SCSS

$custom: #2f3fb5;
$custom-light: #7c74cc;
$custom-dark: #000000;

JSON

{
  "hex": "#2f3fb5",
  "rgb": {
    "r": 47,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 232.836,
    "s": 58.772,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43559,
    "c": 0.18552,
    "h": 270.4
  },
  "luminance": 0.07496
}

Semantic roles & 50–950 ramp

primary

#2F3FB5

secondary

#C7BE79

accent

#CF46E2

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2F3FB5

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

Preview Lab → · Contrast checker → · Palette generator →