#3D40B7#3D40B7

#3D40B7 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.7% C 0.183 H 275.0°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#3D40B7
RGB	rgb(61, 64, 183)
HSL	hsl(239, 50%, 48%)
HSV	hsv(239, 67%, 72%)
CMYK	cmyk(66.7%, 65%, 0%, 28.2%)
CIE-LAB	lab(34.14, 36.79, -63.29)
CIE-LCH	lch(34.14, 73.21, 300.17°)
OKLab	oklab(44.73% 0.016 -0.1826)
OKLCH	oklch(44.73% 0.183 275)
XYZ	xyz(12.3023, 8.0767, 45.7012)
Luminance	0.0808 (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

#3D40B7 #B7B43D

analogous

#3D7DB7 #3D40B7 #773DB7

triadic

#3D40B7 #B73D40 #40B73D

tetradic

#3D40B7 #B73D7D #B7B43D #3DB777

square

#3D40B7 #B73D7D #B7B43D #3DB777

split-complementary

#3D40B7 #B7773D #7DB73D

monochromatic

#1E205B #2E3089 #3D40B7 #6568CC #9395DB

Accessibility & contrast

On white

8.03

#3D40B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#3D40B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3D40B7

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3D40B7	#FFFFFF	#000000	##FFFFFF
##3D40B7	1.00	8.03	2.62	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BB

Deuteranopia (green-blind)

#004BB5

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3d40b7;
/* rgb */ color: rgb(61, 64, 183);
/* oklch */ color: oklch(44.7% 0.183 275.0);

Tailwind

colors: {
  custom: {
    50: '#8275ce',
    500: '#3d40b7',
    950: '#000000',
  },
}

SCSS

$custom: #3d40b7;
$custom-light: #8275ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3d40b7",
  "rgb": {
    "r": 61,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 238.525,
    "s": 50,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44734,
    "c": 0.18332,
    "h": 275
  },
  "luminance": 0.08078
}

Semantic roles & 50–950 ramp

primary

#3D40B7

secondary

#C6C589

accent

#D64EDA

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3D40B7

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

Preview Lab → · Contrast checker → · Palette generator →