#3F71C3#3F71C3

#3F71C3 is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.5% C 0.139 H 259.8°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F71C3
RGB	rgb(63, 113, 195)
HSL	hsl(217, 52%, 51%)
HSV	hsv(217, 68%, 76%)
CMYK	cmyk(67.7%, 42.1%, 0%, 23.5%)
CIE-LAB	lab(48.01, 10.15, -47.87)
CIE-LCH	lch(48.01, 48.93, 281.97°)
OKLab	oklab(55.49% -0.0246 -0.1366)
OKLCH	oklch(55.49% 0.139 259.8)
XYZ	xyz(17.8018, 16.8054, 53.9248)
Luminance	0.1681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71C3 #C3913F

analogous

#3FB3C3 #3F71C3 #4F3FC3

triadic

#3F71C3 #C33F71 #71C33F

tetradic

#3F71C3 #C33FB3 #C3913F #3FC34F

square

#3F71C3 #C33FB3 #C3913F #3FC34F

split-complementary

#3F71C3 #C34F3F #B3C33F

monochromatic

#203B67 #2F5696 #3F71C3 #6E93D2 #9CB6E0

Accessibility & contrast

On white

4.81

#3F71C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3F71C3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71C3

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71C3	#FFFFFF	#000000	##FFFFFF
##3F71C3	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B79C6

Deuteranopia (green-blind)

#356CC1

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f71c3;
/* rgb */ color: rgb(63, 113, 195);
/* oklch */ color: oklch(55.5% 0.139 259.8);

Tailwind

colors: {
  custom: {
    50: '#8299d5',
    500: '#3f71c3',
    950: '#000000',
  },
}

SCSS

$custom: #3f71c3;
$custom-light: #8299d5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71c3",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 195
  },
  "hsl": {
    "h": 217.273,
    "s": 52.381,
    "l": 50.588
  },
  "oklch": {
    "l": 0.55491,
    "c": 0.13881,
    "h": 259.8
  },
  "luminance": 0.16807
}

Semantic roles & 50–950 ramp

primary

#3F71C3

secondary

#CCB692

accent

#A54CDC

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #3F71C3

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

Preview Lab → · Contrast checker → · Palette generator →