#3F71C1#3F71C1

#3F71C1 is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.4% C 0.136 H 259.4°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F71C1
RGB	rgb(63, 113, 193)
HSL	hsl(217, 51%, 50%)
HSV	hsv(217, 67%, 76%)
CMYK	cmyk(67.4%, 41.5%, 0%, 24.3%)
CIE-LAB	lab(47.90, 9.44, -46.90)
CIE-LCH	lch(47.90, 47.84, 281.38°)
OKLab	oklab(55.37% -0.025 -0.1338)
OKLCH	oklch(55.37% 0.136 259.4)
XYZ	xyz(17.5772, 16.7155, 52.7418)
Luminance	0.1672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71C1 #C18F3F

analogous

#3FB2C1 #3F71C1 #4E3FC1

triadic

#3F71C1 #C13F71 #71C13F

tetradic

#3F71C1 #C13FB2 #C18F3F #3FC14E

square

#3F71C1 #C13FB2 #C18F3F #3FC14E

split-complementary

#3F71C1 #C14E3F #B2C13F

monochromatic

#213B65 #305693 #3F71C1 #6D93D0 #9CB5DF

Accessibility & contrast

On white

4.83

#3F71C1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.34

#3F71C1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71C1

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71C1	#FFFFFF	#000000	##FFFFFF
##3F71C1	1.00	4.83	4.34	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.34	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C78C4

Deuteranopia (green-blind)

#376CBF

Tritanopia (blue-blind)

#00838F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f71c1;
/* rgb */ color: rgb(63, 113, 193);
/* oklch */ color: oklch(55.4% 0.136 259.4);

Tailwind

colors: {
  custom: {
    50: '#8299d4',
    500: '#3f71c1',
    950: '#000000',
  },
}

SCSS

$custom: #3f71c1;
$custom-light: #8299d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71c1",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 193
  },
  "hsl": {
    "h": 216.923,
    "s": 51.181,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55366,
    "c": 0.13608,
    "h": 259.4
  },
  "luminance": 0.16717
}

Semantic roles & 50–950 ramp

primary

#3F71C1

secondary

#CBB591

accent

#A44DDB

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #3F71C1

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

Preview Lab → · Contrast checker → · Palette generator →