#3540BB#3540BB

#3540BB is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.191 H 272.0°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#3540BB
RGB	rgb(53, 64, 187)
HSL	hsl(235, 56%, 47%)
HSV	hsv(235, 72%, 73%)
CMYK	cmyk(71.7%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.00, 37.15, -65.90)
CIE-LCH	lch(34.00, 75.65, 299.41°)
OKLab	oklab(44.61% 0.0066 -0.1904)
OKLCH	oklch(44.61% 0.191 272)
XYZ	xyz(12.2682, 8.0103, 47.9037)
Luminance	0.0801 (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

#3540BB #BBB035

analogous

#3583BB #3540BB #6D35BB

triadic

#3540BB #BB3540 #40BB35

tetradic

#3540BB #BB3583 #BBB035 #35BB6D

square

#3540BB #BB3583 #BBB035 #35BB6D

split-complementary

#3540BB #BB6D35 #83BB35

monochromatic

#1A1F5C #27308B #3540BB #5C66D1 #8C93DE

Accessibility & contrast

On white

8.07

#3540BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3540BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540BB

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540BB	#FFFFFF	#000000	##FFFFFF
##3540BB	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3540bb;
/* rgb */ color: rgb(53, 64, 187);
/* oklch */ color: oklch(44.6% 0.191 272.0);

Tailwind

colors: {
  custom: {
    50: '#7f75d1',
    500: '#3540bb',
    950: '#000000',
  },
}

SCSS

$custom: #3540bb;
$custom-light: #7f75d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3540bb",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 235.075,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44612,
    "c": 0.19056,
    "h": 272
  },
  "luminance": 0.08012
}

Semantic roles & 50–950 ramp

primary

#3540BB

secondary

#C9C383

accent

#D349DF

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3540BB

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

Preview Lab → · Contrast checker → · Palette generator →