#2B3FB1#2B3FB1

#2B3FB1 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.0% C 0.181 H 269.3°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#2B3FB1
RGB	rgb(43, 63, 177)
HSL	hsl(231, 61%, 43%)
HSV	hsv(231, 76%, 69%)
CMYK	cmyk(75.7%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.35, 33.07, -62.71)
CIE-LCH	lch(32.35, 70.89, 297.80°)
OKLab	oklab(42.99% -0.0023 -0.1813)
OKLCH	oklch(42.99% 0.181 269.3)
XYZ	xyz(10.7068, 7.2418, 42.4200)
Luminance	0.0724 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B3FB1 #B19D2B

analogous

#2B82B1 #2B3FB1 #5A2BB1

triadic

#2B3FB1 #B12B3F #3FB12B

tetradic

#2B3FB1 #B12B82 #B19D2B #2BB15A

square

#2B3FB1 #B12B82 #B19D2B #2BB15A

split-complementary

#2B3FB1 #B15A2B #82B12B

monochromatic

#131C4F #1F2D80 #2B3FB1 #475CD2 #7887DE

Accessibility & contrast

On white

8.58

#2B3FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#2B3FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B3FB1

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B3FB1	#FFFFFF	#000000	##FFFFFF
##2B3FB1	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #2b3fb1;
/* rgb */ color: rgb(43, 63, 177);
/* oklch */ color: oklch(43.0% 0.181 269.3);

Tailwind

colors: {
  custom: {
    50: '#7974c9',
    500: '#2b3fb1',
    950: '#000000',
  },
}

SCSS

$custom: #2b3fb1;
$custom-light: #7974c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2b3fb1",
  "rgb": {
    "r": 43,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 231.045,
    "s": 60.909,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42987,
    "c": 0.18134,
    "h": 269.3
  },
  "luminance": 0.07243
}

Semantic roles & 50–950 ramp

primary

#2B3FB1

secondary

#C6BA72

accent

#CC44E4

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2B3FB1

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

Preview Lab → · Contrast checker → · Palette generator →