#3540B1#3540B1

#3540B1 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.177 H 272.3°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#3540B1
RGB	rgb(53, 64, 177)
HSL	hsl(235, 54%, 45%)
HSV	hsv(235, 70%, 69%)
CMYK	cmyk(70.1%, 63.8%, 0%, 30.6%)
CIE-LAB	lab(33.13, 33.62, -61.41)
CIE-LCH	lch(33.13, 70.01, 298.70°)
OKLab	oklab(43.7% 0.0073 -0.1773)
OKLCH	oklch(43.7% 0.177 272.3)
XYZ	xyz(11.2347, 7.5969, 42.4607)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3540B1 #B1A635

analogous

#357EB1 #3540B1 #6835B1

triadic

#3540B1 #B13540 #40B135

tetradic

#3540B1 #B1357E #B1A635 #35B168

square

#3540B1 #B1357E #B1A635 #35B168

split-complementary

#3540B1 #B16835 #7EB135

monochromatic

#191E53 #272F82 #3540B1 #5761CD #868DDB

Accessibility & contrast

On white

8.33

#3540B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#3540B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B1

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B1	#FFFFFF	#000000	##FFFFFF
##3540B1	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)

#0054B5

Deuteranopia (green-blind)

#0048AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3540b1;
/* rgb */ color: rgb(53, 64, 177);
/* oklch */ color: oklch(43.7% 0.177 272.3);

Tailwind

colors: {
  custom: {
    50: '#7d75c9',
    500: '#3540b1',
    950: '#000000',
  },
}

SCSS

$custom: #3540b1;
$custom-light: #7d75c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b1",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 177
  },
  "hsl": {
    "h": 234.677,
    "s": 53.913,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43702,
    "c": 0.17746,
    "h": 272.3
  },
  "luminance": 0.07598
}

Semantic roles & 50–950 ramp

primary

#3540B1

secondary

#C4BE7D

accent

#D04BDD

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3540B1

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

Preview Lab → · Contrast checker → · Palette generator →