#3F40D2#3F40D2

#3F40D2 is a mid, highly saturated blue. Relative luminance 0.094; OKLCH L 47.4% C 0.217 H 274.0°. Best body text is #FFFFFF at 7.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F40D2
RGB	rgb(63, 64, 210)
HSL	hsl(240, 62%, 54%)
HSV	hsv(240, 70%, 82%)
CMYK	cmyk(70%, 69.5%, 0%, 17.6%)
CIE-LAB	lab(36.70, 46.10, -74.87)
CIE-LCH	lch(36.70, 87.93, 301.62°)
OKLab	oklab(47.36% 0.0153 -0.2164)
OKLCH	oklch(47.36% 0.217 274)
XYZ	xyz(15.5123, 9.3752, 61.9524)
Luminance	0.0938 (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

#3F40D2 #D2D13F

analogous

#3F89D2 #3F40D2 #873FD2

triadic

#3F40D2 #D23F40 #40D23F

tetradic

#3F40D2 #D23F89 #D2D13F #3FD287

square

#3F40D2 #D23F89 #D2D13F #3FD287

split-complementary

#3F40D2 #D2873F #89D23F

monochromatic

#1D1D7A #2829AC #3F40D2 #7171DE #A2A3E9

Accessibility & contrast

On white

7.30

#3F40D2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F40D2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F40D2

7.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F40D2	#FFFFFF	#000000	##FFFFFF
##3F40D2	1.00	7.30	2.88	7.30
#FFFFFF	7.30	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DD6

Deuteranopia (green-blind)

#004FCF

Tritanopia (blue-blind)

#006884

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f40d2;
/* rgb */ color: rgb(63, 64, 210);
/* oklch */ color: oklch(47.4% 0.217 274.0);

Tailwind

colors: {
  custom: {
    50: '#8876e1',
    500: '#3f40d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f40d2;
$custom-light: #8876e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f40d2",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 210
  },
  "hsl": {
    "h": 239.592,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.47359,
    "c": 0.21698,
    "h": 274
  },
  "luminance": 0.09377
}

Semantic roles & 50–950 ramp

primary

#3F40D2

secondary

#D6D597

accent

#E443E5

background

#F9F7FE

surface

#F1EDFC

border

#CBC8D5

text

#0D0815

muted

#7E7B84

Preview Lab

Preview with #3F40D2

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

Preview Lab → · Contrast checker → · Palette generator →