#3A40B8#3A40B8

#3A40B8 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.6% C 0.185 H 273.8°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#3A40B8
RGB	rgb(58, 64, 184)
HSL	hsl(237, 52%, 47%)
HSV	hsv(237, 68%, 72%)
CMYK	cmyk(68.5%, 65.2%, 0%, 27.8%)
CIE-LAB	lab(34.04, 36.73, -64.06)
CIE-LCH	lch(34.04, 73.85, 299.83°)
OKLab	oklab(44.63% 0.0124 -0.1849)
OKLCH	oklch(44.63% 0.185 273.8)
XYZ	xyz(12.2272, 8.0259, 46.2429)
Luminance	0.0803 (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

#3A40B8 #B8B23A

analogous

#3A7FB8 #3A40B8 #733AB8

triadic

#3A40B8 #B83A40 #40B83A

tetradic

#3A40B8 #B83A7F #B8B23A #3AB873

square

#3A40B8 #B83A7F #B8B23A #3AB873

split-complementary

#3A40B8 #B8733A #7FB83A

monochromatic

#1D205B #2B3089 #3A40B8 #6267CD #9094DC

Accessibility & contrast

On white

8.06

#3A40B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3A40B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A40B8

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A40B8	#FFFFFF	#000000	##FFFFFF
##3A40B8	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004AB6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3a40b8;
/* rgb */ color: rgb(58, 64, 184);
/* oklch */ color: oklch(44.6% 0.185 273.8);

Tailwind

colors: {
  custom: {
    50: '#8075ce',
    500: '#3a40b8',
    950: '#000000',
  },
}

SCSS

$custom: #3a40b8;
$custom-light: #8075ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3a40b8",
  "rgb": {
    "r": 58,
    "g": 64,
    "b": 184
  },
  "hsl": {
    "h": 237.143,
    "s": 52.066,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44634,
    "c": 0.18537,
    "h": 273.8
  },
  "luminance": 0.08027
}

Semantic roles & 50–950 ramp

primary

#3A40B8

secondary

#C7C487

accent

#D54CDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3A40B8

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

Preview Lab → · Contrast checker → · Palette generator →