#3540A5#3540A5

#3540A5 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.161 H 272.8°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#3540A5
RGB	rgb(53, 64, 165)
HSL	hsl(234, 51%, 43%)
HSV	hsv(234, 68%, 65%)
CMYK	cmyk(67.9%, 61.2%, 0%, 35.3%)
CIE-LAB	lab(32.12, 29.33, -55.88)
CIE-LCH	lch(32.12, 63.11, 297.69°)
OKLab	oklab(42.65% 0.0077 -0.1611)
OKLCH	oklch(42.65% 0.161 272.8)
XYZ	xyz(10.0909, 7.1394, 36.4363)
Luminance	0.0714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3540A5 #A59A35

analogous

#3578A5 #3540A5 #6235A5

triadic

#3540A5 #A53540 #40A535

tetradic

#3540A5 #A53578 #A59A35 #35A562

square

#3540A5 #A53578 #A59A35 #35A562

split-complementary

#3540A5 #A56235 #78A535

monochromatic

#171C48 #262E77 #3540A5 #505CC7 #7F87D6

Accessibility & contrast

On white

8.65

#3540A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3540A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540A5

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540A5	#FFFFFF	#000000	##FFFFFF
##3540A5	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A8

Deuteranopia (green-blind)

#0047A3

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3540a5;
/* rgb */ color: rgb(53, 64, 165);
/* oklch */ color: oklch(42.6% 0.161 272.8);

Tailwind

colors: {
  custom: {
    50: '#7a74c1',
    500: '#3540a5',
    950: '#000000',
  },
}

SCSS

$custom: #3540a5;
$custom-light: #7a74c1;
$custom-dark: #000000;

JSON

{
  "hex": "#3540a5",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 165
  },
  "hsl": {
    "h": 234.107,
    "s": 51.376,
    "l": 42.745
  },
  "oklch": {
    "l": 0.42648,
    "c": 0.16127,
    "h": 272.8
  },
  "luminance": 0.0714
}

Semantic roles & 50–950 ramp

primary

#3540A5

secondary

#BFB877

accent

#CD4DDB

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #3540A5

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

Preview Lab → · Contrast checker → · Palette generator →