#3540B8#3540B8

#3540B8 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.3% C 0.187 H 272.1°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#3540B8
RGB	rgb(53, 64, 184)
HSL	hsl(235, 55%, 46%)
HSV	hsv(235, 71%, 72%)
CMYK	cmyk(71.2%, 65.2%, 0%, 27.8%)
CIE-LAB	lab(33.74, 36.10, -64.56)
CIE-LCH	lch(33.74, 73.97, 299.21°)
OKLab	oklab(44.34% 0.0068 -0.1865)
OKLCH	oklch(44.34% 0.187 272.1)
XYZ	xyz(11.9504, 7.8832, 46.2299)
Luminance	0.0788 (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

#3540B8 #B8AD35

analogous

#3582B8 #3540B8 #6C35B8

triadic

#3540B8 #B83540 #40B835

tetradic

#3540B8 #B83582 #B8AD35 #35B86C

square

#3540B8 #B83582 #B8AD35 #35B86C

split-complementary

#3540B8 #B86C35 #82B835

monochromatic

#1A1F59 #272F88 #3540B8 #5B64D0 #8A91DD

Accessibility & contrast

On white

8.15

#3540B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3540B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B8

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B8	#FFFFFF	#000000	##FFFFFF
##3540B8	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3540b8;
/* rgb */ color: rgb(53, 64, 184);
/* oklch */ color: oklch(44.3% 0.187 272.1);

Tailwind

colors: {
  custom: {
    50: '#7e75ce',
    500: '#3540b8',
    950: '#000000',
  },
}

SCSS

$custom: #3540b8;
$custom-light: #7e75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b8",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 184
  },
  "hsl": {
    "h": 234.962,
    "s": 55.274,
    "l": 46.471
  },
  "oklch": {
    "l": 0.44337,
    "c": 0.18666,
    "h": 272.1
  },
  "luminance": 0.07884
}

Semantic roles & 50–950 ramp

primary

#3540B8

secondary

#C7C281

accent

#D249DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3540B8

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

Preview Lab → · Contrast checker → · Palette generator →