#3B40B8#3B40B8

#3B40B8 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.7% C 0.185 H 274.2°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#3B40B8
RGB	rgb(59, 64, 184)
HSL	hsl(238, 51%, 48%)
HSV	hsv(238, 68%, 72%)
CMYK	cmyk(67.9%, 65.2%, 0%, 27.8%)
CIE-LAB	lab(34.10, 36.86, -63.96)
CIE-LCH	lch(34.10, 73.82, 299.96°)
OKLab	oklab(44.7% 0.0136 -0.1846)
OKLCH	oklch(44.7% 0.185 274.2)
XYZ	xyz(12.2859, 8.0562, 46.2456)
Luminance	0.0806 (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

#3B40B8 #B8B33B

analogous

#3B7EB8 #3B40B8 #743BB8

triadic

#3B40B8 #B83B40 #40B83B

tetradic

#3B40B8 #B83B7E #B8B33B #3BB874

square

#3B40B8 #B83B7E #B8B33B #3BB874

split-complementary

#3B40B8 #B8743B #7EB83B

monochromatic

#1D205B #2C308A #3B40B8 #6367CD #9294DC

Accessibility & contrast

On white

8.04

#3B40B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3B40B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B40B8

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B40B8	#FFFFFF	#000000	##FFFFFF
##3B40B8	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004BB6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3b40b8;
/* rgb */ color: rgb(59, 64, 184);
/* oklch */ color: oklch(44.7% 0.185 274.2);

Tailwind

colors: {
  custom: {
    50: '#8175ce',
    500: '#3b40b8',
    950: '#000000',
  },
}

SCSS

$custom: #3b40b8;
$custom-light: #8175ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3b40b8",
  "rgb": {
    "r": 59,
    "g": 64,
    "b": 184
  },
  "hsl": {
    "h": 237.6,
    "s": 51.44,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44696,
    "c": 0.18512,
    "h": 274.2
  },
  "luminance": 0.08057
}

Semantic roles & 50–950 ramp

primary

#3B40B8

secondary

#C7C488

accent

#D54DDB

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3B40B8

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

Preview Lab → · Contrast checker → · Palette generator →