#3540B4#3540B4

#3540B4 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.181 H 272.2°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#3540B4
RGB	rgb(53, 64, 180)
HSL	hsl(235, 55%, 46%)
HSV	hsv(235, 71%, 71%)
CMYK	cmyk(70.6%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(33.39, 34.68, -62.77)
CIE-LCH	lch(33.39, 71.72, 298.92°)
OKLab	oklab(43.97% 0.0071 -0.1813)
OKLCH	oklch(43.97% 0.181 272.2)
XYZ	xyz(11.5370, 7.7178, 44.0528)
Luminance	0.0772 (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

#3540B4 #B4A935

analogous

#357FB4 #3540B4 #6935B4

triadic

#3540B4 #B43540 #40B435

tetradic

#3540B4 #B4357F #B4A935 #35B469

square

#3540B4 #B4357F #B4A935 #35B469

split-complementary

#3540B4 #B46935 #7FB435

monochromatic

#191E55 #272F85 #3540B4 #5862CE #888FDC

Accessibility & contrast

On white

8.26

#3540B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3540B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B4

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B4	#FFFFFF	#000000	##FFFFFF
##3540B4	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B8

Deuteranopia (green-blind)

#0049B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3540b4;
/* rgb */ color: rgb(53, 64, 180);
/* oklch */ color: oklch(44.0% 0.181 272.2);

Tailwind

colors: {
  custom: {
    50: '#7e75cb',
    500: '#3540b4',
    950: '#000000',
  },
}

SCSS

$custom: #3540b4;
$custom-light: #7e75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b4",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 234.803,
    "s": 54.506,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43972,
    "c": 0.18143,
    "h": 272.2
  },
  "luminance": 0.07719
}

Semantic roles & 50–950 ramp

primary

#3540B4

secondary

#C6C07F

accent

#D14ADE

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3540B4

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

Preview Lab → · Contrast checker → · Palette generator →