#3540B9#3540B9

#3540B9 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.188 H 272.1°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#3540B9
RGB	rgb(53, 64, 185)
HSL	hsl(235, 55%, 47%)
HSV	hsv(235, 71%, 73%)
CMYK	cmyk(71.4%, 65.4%, 0%, 27.5%)
CIE-LAB	lab(33.83, 36.45, -65.01)
CIE-LCH	lch(33.83, 74.53, 299.28°)
OKLab	oklab(44.43% 0.0068 -0.1878)
OKLCH	oklch(44.43% 0.188 272.1)
XYZ	xyz(12.0556, 7.9253, 46.7839)
Luminance	0.0793 (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

#3540B9 #B9AE35

analogous

#3582B9 #3540B9 #6C35B9

triadic

#3540B9 #B93540 #40B935

tetradic

#3540B9 #B93582 #B9AE35 #35B96C

square

#3540B9 #B93582 #B9AE35 #35B96C

split-complementary

#3540B9 #B96C35 #82B935

monochromatic

#1A1F5A #273089 #3540B9 #5B65D0 #8B92DE

Accessibility & contrast

On white

8.12

#3540B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3540B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B9

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B9	#FFFFFF	#000000	##FFFFFF
##3540B9	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3540b9;
/* rgb */ color: rgb(53, 64, 185);
/* oklch */ color: oklch(44.4% 0.188 272.1);

Tailwind

colors: {
  custom: {
    50: '#7f75cf',
    500: '#3540b9',
    950: '#000000',
  },
}

SCSS

$custom: #3540b9;
$custom-light: #7f75cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b9",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 185
  },
  "hsl": {
    "h": 235,
    "s": 55.462,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44428,
    "c": 0.18797,
    "h": 272.1
  },
  "luminance": 0.07926
}

Semantic roles & 50–950 ramp

primary

#3540B9

secondary

#C8C282

accent

#D249DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3540B9

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

Preview Lab → · Contrast checker → · Palette generator →