#3F40D0#3F40D0

#3F40D0 is a mid, highly saturated blue. Relative luminance 0.093; OKLCH L 47.2% C 0.215 H 274.2°. Best body text is #FFFFFF at 7.35:1 contrast (WCAG AA passes).

Color values

HEX	#3F40D0
RGB	rgb(63, 64, 208)
HSL	hsl(240, 61%, 53%)
HSV	hsv(240, 70%, 82%)
CMYK	cmyk(69.7%, 69.2%, 0%, 18.4%)
CIE-LAB	lab(36.51, 45.44, -74.02)
CIE-LCH	lch(36.51, 86.86, 301.55°)
OKLab	oklab(47.17% 0.0155 -0.214)
OKLCH	oklch(47.17% 0.215 274.2)
XYZ	xyz(15.2647, 9.2762, 60.6483)
Luminance	0.0928 (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

#3F40D0 #D0CF3F

analogous

#3F88D0 #3F40D0 #863FD0

triadic

#3F40D0 #D03F40 #40D03F

tetradic

#3F40D0 #D03F88 #D0CF3F #3FD086

square

#3F40D0 #D03F88 #D0CF3F #3FD086

split-complementary

#3F40D0 #D0863F #88D03F

monochromatic

#1D1E77 #292AA9 #3F40D0 #7071DC #A1A2E8

Accessibility & contrast

On white

7.35

#3F40D0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#3F40D0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F40D0

7.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F40D0	#FFFFFF	#000000	##FFFFFF
##3F40D0	1.00	7.35	2.86	7.35
#FFFFFF	7.35	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DD4

Deuteranopia (green-blind)

#004FCD

Tritanopia (blue-blind)

#006783

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f40d0;
/* rgb */ color: rgb(63, 64, 208);
/* oklch */ color: oklch(47.2% 0.215 274.2);

Tailwind

colors: {
  custom: {
    50: '#8876e0',
    500: '#3f40d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f40d0;
$custom-light: #8876e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f40d0",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 208
  },
  "hsl": {
    "h": 239.586,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.47168,
    "c": 0.21452,
    "h": 274.2
  },
  "luminance": 0.09278
}

Semantic roles & 50–950 ramp

primary

#3F40D0

secondary

#D5D496

accent

#E344E4

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #3F40D0

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

Preview Lab → · Contrast checker → · Palette generator →