#3A40BB#3A40BB

#3A40BB is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.9% C 0.189 H 273.7°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#3A40BB
RGB	rgb(58, 64, 187)
HSL	hsl(237, 53%, 48%)
HSV	hsv(237, 69%, 73%)
CMYK	cmyk(69%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.30, 37.77, -65.40)
CIE-LCH	lch(34.30, 75.52, 300.00°)
OKLab	oklab(44.91% 0.0122 -0.1889)
OKLCH	oklch(44.91% 0.189 273.7)
XYZ	xyz(12.5450, 8.1530, 47.9166)
Luminance	0.0815 (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

#3A40BB #BBB53A

analogous

#3A81BB #3A40BB #743ABB

triadic

#3A40BB #BB3A40 #40BB3A

tetradic

#3A40BB #BB3A81 #BBB53A #3ABB74

square

#3A40BB #BB3A81 #BBB53A #3ABB74

split-complementary

#3A40BB #BB743A #81BB3A

monochromatic

#1D205E #2C308C #3A40BB #6368CF #9296DD

Accessibility & contrast

On white

7.98

#3A40BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3A40BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A40BB

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A40BB	#FFFFFF	#000000	##FFFFFF
##3A40BB	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3a40bb;
/* rgb */ color: rgb(58, 64, 187);
/* oklch */ color: oklch(44.9% 0.189 273.7);

Tailwind

colors: {
  custom: {
    50: '#8175d0',
    500: '#3a40bb',
    950: '#000000',
  },
}

SCSS

$custom: #3a40bb;
$custom-light: #8175d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3a40bb",
  "rgb": {
    "r": 58,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 237.209,
    "s": 52.653,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44906,
    "c": 0.18927,
    "h": 273.7
  },
  "luminance": 0.08154
}

Semantic roles & 50–950 ramp

primary

#3A40BB

secondary

#C8C588

accent

#D54CDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3A40BB

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

Preview Lab → · Contrast checker → · Palette generator →