#3A40B7#3A40B7

#3A40B7 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.5% C 0.184 H 273.9°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#3A40B7
RGB	rgb(58, 64, 183)
HSL	hsl(237, 52%, 47%)
HSV	hsv(237, 68%, 72%)
CMYK	cmyk(68.3%, 65%, 0%, 28.2%)
CIE-LAB	lab(33.95, 36.38, -63.62)
CIE-LCH	lch(33.95, 73.29, 299.77°)
OKLab	oklab(44.54% 0.0125 -0.1836)
OKLCH	oklch(44.54% 0.184 273.9)
XYZ	xyz(12.1227, 7.9841, 45.6928)
Luminance	0.0799 (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

#3A40B7 #B7B13A

analogous

#3A7FB7 #3A40B7 #733AB7

triadic

#3A40B7 #B73A40 #40B73A

tetradic

#3A40B7 #B73A7F #B7B13A #3AB773

square

#3A40B7 #B73A7F #B7B13A #3AB773

split-complementary

#3A40B7 #B7733A #7FB73A

monochromatic

#1D1F5A #2B3089 #3A40B7 #6166CD #9093DC

Accessibility & contrast

On white

8.09

#3A40B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3A40B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A40B7

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A40B7	#FFFFFF	#000000	##FFFFFF
##3A40B7	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BB

Deuteranopia (green-blind)

#004AB5

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3a40b7;
/* rgb */ color: rgb(58, 64, 183);
/* oklch */ color: oklch(44.5% 0.184 273.9);

Tailwind

colors: {
  custom: {
    50: '#8075ce',
    500: '#3a40b7',
    950: '#000000',
  },
}

SCSS

$custom: #3a40b7;
$custom-light: #8075ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3a40b7",
  "rgb": {
    "r": 58,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 237.12,
    "s": 51.867,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44543,
    "c": 0.18406,
    "h": 273.9
  },
  "luminance": 0.07985
}

Semantic roles & 50–950 ramp

primary

#3A40B7

secondary

#C7C386

accent

#D44CDB

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3A40B7

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

Preview Lab → · Contrast checker → · Palette generator →