#3B40B9#3B40B9

#3B40B9 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.8% C 0.186 H 274.1°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#3B40B9
RGB	rgb(59, 64, 185)
HSL	hsl(238, 52%, 48%)
HSV	hsv(238, 68%, 73%)
CMYK	cmyk(68.1%, 65.4%, 0%, 27.5%)
CIE-LAB	lab(34.19, 37.21, -64.41)
CIE-LCH	lch(34.19, 74.38, 300.01°)
OKLab	oklab(44.79% 0.0135 -0.1859)
OKLCH	oklch(44.79% 0.186 274.1)
XYZ	xyz(12.3911, 8.0982, 46.7996)
Luminance	0.0810 (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

#3B40B9 #B9B43B

analogous

#3B7FB9 #3B40B9 #753BB9

triadic

#3B40B9 #B93B40 #40B93B

tetradic

#3B40B9 #B93B7F #B9B43B #3BB975

square

#3B40B9 #B93B7F #B9B43B #3BB975

split-complementary

#3B40B9 #B9753B #7FB93B

monochromatic

#1D205C #2C308B #3B40B9 #6468CD #9295DC

Accessibility & contrast

On white

8.02

#3B40B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#3B40B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3B40B9

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B40B9	#FFFFFF	#000000	##FFFFFF
##3B40B9	1.00	8.02	2.62	8.02
#FFFFFF	8.02	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BD

Deuteranopia (green-blind)

#004BB7

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3b40b9;
/* rgb */ color: rgb(59, 64, 185);
/* oklch */ color: oklch(44.8% 0.186 274.1);

Tailwind

colors: {
  custom: {
    50: '#8175cf',
    500: '#3b40b9',
    950: '#000000',
  },
}

SCSS

$custom: #3b40b9;
$custom-light: #8175cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3b40b9",
  "rgb": {
    "r": 59,
    "g": 64,
    "b": 185
  },
  "hsl": {
    "h": 237.619,
    "s": 51.639,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44786,
    "c": 0.18642,
    "h": 274.1
  },
  "luminance": 0.08099
}

Semantic roles & 50–950 ramp

primary

#3B40B9

secondary

#C7C588

accent

#D54DDB

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3B40B9

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

Preview Lab → · Contrast checker → · Palette generator →