#3540B7#3540B7

#3540B7 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.185 H 272.1°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#3540B7
RGB	rgb(53, 64, 183)
HSL	hsl(235, 55%, 46%)
HSV	hsv(235, 71%, 72%)
CMYK	cmyk(71%, 65%, 0%, 28.2%)
CIE-LAB	lab(33.65, 35.74, -64.12)
CIE-LCH	lch(33.65, 73.41, 299.14°)
OKLab	oklab(44.25% 0.0069 -0.1852)
OKLCH	oklch(44.25% 0.185 272.1)
XYZ	xyz(11.8460, 7.8414, 45.6798)
Luminance	0.0784 (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

#3540B7 #B7AC35

analogous

#3581B7 #3540B7 #6B35B7

triadic

#3540B7 #B73540 #40B735

tetradic

#3540B7 #B73581 #B7AC35 #35B76B

square

#3540B7 #B73581 #B7AC35 #35B76B

split-complementary

#3540B7 #B76B35 #81B735

monochromatic

#1A1F58 #272F88 #3540B7 #5A64CF #8991DD

Accessibility & contrast

On white

8.18

#3540B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3540B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B7

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B7	#FFFFFF	#000000	##FFFFFF
##3540B7	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#0049B5

Tritanopia (blue-blind)

#005F75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3540b7;
/* rgb */ color: rgb(53, 64, 183);
/* oklch */ color: oklch(44.2% 0.185 272.1);

Tailwind

colors: {
  custom: {
    50: '#7e75ce',
    500: '#3540b7',
    950: '#000000',
  },
}

SCSS

$custom: #3540b7;
$custom-light: #7e75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b7",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 234.923,
    "s": 55.085,
    "l": 46.275
  },
  "oklch": {
    "l": 0.44245,
    "c": 0.18536,
    "h": 272.1
  },
  "luminance": 0.07843
}

Semantic roles & 50–950 ramp

primary

#3540B7

secondary

#C7C181

accent

#D249DE

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3540B7

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

Preview Lab → · Contrast checker → · Palette generator →