#3F71CA#3F71CA

#3F71CA is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.9% C 0.148 H 261.0°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3F71CA
RGB	rgb(63, 113, 202)
HSL	hsl(218, 57%, 52%)
HSV	hsv(218, 69%, 79%)
CMYK	cmyk(68.8%, 44.1%, 0%, 20.8%)
CIE-LAB	lab(48.42, 12.67, -51.23)
CIE-LCH	lch(48.42, 52.77, 283.89°)
OKLab	oklab(55.94% -0.0233 -0.1465)
OKLCH	oklch(55.94% 0.148 261)
XYZ	xyz(18.6119, 17.1294, 58.1911)
Luminance	0.1713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71CA #CA983F

analogous

#3FB7CA #3F71CA #523FCA

triadic

#3F71CA #CA3F71 #71CA3F

tetradic

#3F71CA #CA3FB7 #CA983F #3FCA52

square

#3F71CA #CA3FB7 #CA983F #3FCA52

split-complementary

#3F71CA #CA523F #B7CA3F

monochromatic

#1F3C70 #2C56A0 #3F71CA #6F94D7 #9FB8E4

Accessibility & contrast

On white

4.74

#3F71CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3F71CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71CA

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71CA	#FFFFFF	#000000	##FFFFFF
##3F71CA	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#467ACD

Deuteranopia (green-blind)

#2D6DC8

Tritanopia (blue-blind)

#008693

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f71ca;
/* rgb */ color: rgb(63, 113, 202);
/* oklch */ color: oklch(55.9% 0.148 261.0);

Tailwind

colors: {
  custom: {
    50: '#8399db',
    500: '#3f71ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f71ca;
$custom-light: #8399db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71ca",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 202
  },
  "hsl": {
    "h": 218.417,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55939,
    "c": 0.14832,
    "h": 261
  },
  "luminance": 0.17131
}

Semantic roles & 50–950 ramp

primary

#3F71CA

secondary

#D1BB94

accent

#A948E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F71CA

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

Preview Lab → · Contrast checker → · Palette generator →