#3A40B9#3A40B9

#3A40B9 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.7% C 0.187 H 273.8°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#3A40B9
RGB	rgb(58, 64, 185)
HSL	hsl(237, 52%, 48%)
HSV	hsv(237, 69%, 73%)
CMYK	cmyk(68.6%, 65.4%, 0%, 27.5%)
CIE-LAB	lab(34.12, 37.08, -64.51)
CIE-LCH	lch(34.12, 74.41, 299.89°)
OKLab	oklab(44.72% 0.0123 -0.1863)
OKLCH	oklch(44.72% 0.187 273.8)
XYZ	xyz(12.3324, 8.0680, 46.7969)
Luminance	0.0807 (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

#3A40B9 #B9B33A

analogous

#3A80B9 #3A40B9 #733AB9

triadic

#3A40B9 #B93A40 #40B93A

tetradic

#3A40B9 #B93A80 #B9B33A #3AB973

square

#3A40B9 #B93A80 #B9B33A #3AB973

split-complementary

#3A40B9 #B9733A #80B93A

monochromatic

#1D205C #2B308A #3A40B9 #6267CE #9194DC

Accessibility & contrast

On white

8.03

#3A40B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3A40B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A40B9

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A40B9	#FFFFFF	#000000	##FFFFFF
##3A40B9	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BD

Deuteranopia (green-blind)

#004AB7

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3a40b9;
/* rgb */ color: rgb(58, 64, 185);
/* oklch */ color: oklch(44.7% 0.187 273.8);

Tailwind

colors: {
  custom: {
    50: '#8175cf',
    500: '#3a40b9',
    950: '#000000',
  },
}

SCSS

$custom: #3a40b9;
$custom-light: #8175cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3a40b9",
  "rgb": {
    "r": 58,
    "g": 64,
    "b": 185
  },
  "hsl": {
    "h": 237.165,
    "s": 52.263,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44724,
    "c": 0.18667,
    "h": 273.8
  },
  "luminance": 0.08069
}

Semantic roles & 50–950 ramp

primary

#3A40B9

secondary

#C7C487

accent

#D54CDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3A40B9

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

Preview Lab → · Contrast checker → · Palette generator →