#3540B5#3540B5

#3540B5 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.1% C 0.183 H 272.2°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#3540B5
RGB	rgb(53, 64, 181)
HSL	hsl(235, 55%, 46%)
HSV	hsv(235, 71%, 71%)
CMYK	cmyk(70.7%, 64.6%, 0%, 29%)
CIE-LAB	lab(33.48, 35.04, -63.22)
CIE-LCH	lch(33.48, 72.28, 299.00°)
OKLab	oklab(44.06% 0.007 -0.1826)
OKLCH	oklch(44.06% 0.183 272.2)
XYZ	xyz(11.6393, 7.7587, 44.5913)
Luminance	0.0776 (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

#3540B5 #B5AA35

analogous

#3580B5 #3540B5 #6A35B5

triadic

#3540B5 #B53540 #40B535

tetradic

#3540B5 #B53580 #B5AA35 #35B56A

square

#3540B5 #B53580 #B5AA35 #35B56A

split-complementary

#3540B5 #B56A35 #80B535

monochromatic

#191F56 #272F86 #3540B5 #5963CE #888FDC

Accessibility & contrast

On white

8.23

#3540B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3540B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B5

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B5	#FFFFFF	#000000	##FFFFFF
##3540B5	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B9

Deuteranopia (green-blind)

#0049B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3540b5;
/* rgb */ color: rgb(53, 64, 181);
/* oklch */ color: oklch(44.1% 0.183 272.2);

Tailwind

colors: {
  custom: {
    50: '#7e75cc',
    500: '#3540b5',
    950: '#000000',
  },
}

SCSS

$custom: #3540b5;
$custom-light: #7e75cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b5",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 181
  },
  "hsl": {
    "h": 234.844,
    "s": 54.701,
    "l": 45.882
  },
  "oklch": {
    "l": 0.44063,
    "c": 0.18274,
    "h": 272.2
  },
  "luminance": 0.0776
}

Semantic roles & 50–950 ramp

primary

#3540B5

secondary

#C6C080

accent

#D14ADE

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3540B5

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

Preview Lab → · Contrast checker → · Palette generator →