#3F40D4#3F40D4

#3F40D4 is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.5% C 0.219 H 273.9°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F40D4
RGB	rgb(63, 64, 212)
HSL	hsl(240, 63%, 54%)
HSV	hsv(240, 70%, 83%)
CMYK	cmyk(70.3%, 69.8%, 0%, 16.9%)
CIE-LAB	lab(36.88, 46.76, -75.72)
CIE-LCH	lch(36.88, 88.99, 301.70°)
OKLab	oklab(47.55% 0.015 -0.2189)
OKLCH	oklch(47.55% 0.219 273.9)
XYZ	xyz(15.7630, 9.4755, 63.2728)
Luminance	0.0948 (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

#3F40D4 #D4D33F

analogous

#3F8BD4 #3F40D4 #893FD4

triadic

#3F40D4 #D43F40 #40D43F

tetradic

#3F40D4 #D43F8B #D4D33F #3FD489

square

#3F40D4 #D43F8B #D4D33F #3FD489

split-complementary

#3F40D4 #D4893F #8BD43F

monochromatic

#1C1D7D #2728AF #3F40D4 #7172DF #A3A3EA

Accessibility & contrast

On white

7.25

#3F40D4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F40D4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F40D4

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F40D4	#FFFFFF	#000000	##FFFFFF
##3F40D4	1.00	7.25	2.90	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED8

Deuteranopia (green-blind)

#0050D1

Tritanopia (blue-blind)

#006985

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f40d4;
/* rgb */ color: rgb(63, 64, 212);
/* oklch */ color: oklch(47.5% 0.219 273.9);

Tailwind

colors: {
  custom: {
    50: '#8976e2',
    500: '#3f40d4',
    950: '#000000',
  },
}

SCSS

$custom: #3f40d4;
$custom-light: #8976e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f40d4",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 212
  },
  "hsl": {
    "h": 239.597,
    "s": 63.404,
    "l": 53.922
  },
  "oklch": {
    "l": 0.4755,
    "c": 0.21942,
    "h": 273.9
  },
  "luminance": 0.09477
}

Semantic roles & 50–950 ramp

primary

#3F40D4

secondary

#D7D798

accent

#E541E6

background

#F9F7FE

surface

#F1EDFC

border

#CBC8D5

text

#0D0816

muted

#7E7B84

Preview Lab

Preview with #3F40D4

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

Preview Lab → · Contrast checker → · Palette generator →