#3540B3#3540B3

#3540B3 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.180 H 272.3°. Best body text is #FFFFFF at 8.28:1 contrast (WCAG AA passes).

Color values

HEX	#3540B3
RGB	rgb(53, 64, 179)
HSL	hsl(235, 54%, 45%)
HSV	hsv(235, 70%, 70%)
CMYK	cmyk(70.4%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(33.30, 34.33, -62.32)
CIE-LCH	lch(33.30, 71.15, 298.85°)
OKLab	oklab(43.88% 0.0072 -0.18)
OKLCH	oklch(43.88% 0.18 272.3)
XYZ	xyz(11.4355, 7.6772, 43.5183)
Luminance	0.0768 (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

#3540B3 #B3A835

analogous

#357FB3 #3540B3 #6935B3

triadic

#3540B3 #B33540 #40B335

tetradic

#3540B3 #B3357F #B3A835 #35B369

square

#3540B3 #B3357F #B3A835 #35B369

split-complementary

#3540B3 #B36935 #7FB335

monochromatic

#191E55 #272F84 #3540B3 #5862CD #878EDB

Accessibility & contrast

On white

8.28

#3540B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3540B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3540B3

8.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3540B3	#FFFFFF	#000000	##FFFFFF
##3540B3	1.00	8.28	2.54	8.28
#FFFFFF	8.28	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0049B1

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3540b3;
/* rgb */ color: rgb(53, 64, 179);
/* oklch */ color: oklch(43.9% 0.180 272.3);

Tailwind

colors: {
  custom: {
    50: '#7d75cb',
    500: '#3540b3',
    950: '#000000',
  },
}

SCSS

$custom: #3540b3;
$custom-light: #7d75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3540b3",
  "rgb": {
    "r": 53,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 234.762,
    "s": 54.31,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43882,
    "c": 0.1801,
    "h": 272.3
  },
  "luminance": 0.07678
}

Semantic roles & 50–950 ramp

primary

#3540B3

secondary

#C5BF7F

accent

#D14ADE

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3540B3

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

Preview Lab → · Contrast checker → · Palette generator →