#3F6CB2#3F6CB2

#3F6CB2 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.3% C 0.121 H 258.9°. Best body text is #FFFFFF at 5.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CB2
RGB	rgb(63, 108, 178)
HSL	hsl(217, 48%, 47%)
HSV	hsv(217, 65%, 70%)
CMYK	cmyk(64.6%, 39.3%, 0%, 30.2%)
CIE-LAB	lab(45.63, 7.22, -41.82)
CIE-LCH	lch(45.63, 42.44, 279.79°)
OKLab	oklab(53.33% -0.0233 -0.1189)
OKLCH	oklch(53.33% 0.121 258.9)
XYZ	xyz(15.4455, 14.9948, 44.1912)
Luminance	0.1500 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CB2 #B2853F

analogous

#3FA5B2 #3F6CB2 #4C3FB2

triadic

#3F6CB2 #B23F6C #6CB23F

tetradic

#3F6CB2 #B23FA5 #B2853F #3FB24C

square

#3F6CB2 #B23FA5 #B2853F #3FB24C

split-complementary

#3F6CB2 #B24C3F #A5B23F

monochromatic

#1F3558 #2F5185 #3F6CB2 #668CC9 #93AED9

Accessibility & contrast

On white

5.25

#3F6CB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.00

#3F6CB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CB2

5.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CB2	#FFFFFF	#000000	##FFFFFF
##3F6CB2	1.00	5.25	4.00	5.25
#FFFFFF	5.25	1.00	21.00	1.00
#000000	4.00	21.00	1.00	21.00
##FFFFFF	5.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D72B5

Deuteranopia (green-blind)

#3C67B1

Tritanopia (blue-blind)

#007C86

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3f6cb2;
/* rgb */ color: rgb(63, 108, 178);
/* oklch */ color: oklch(53.3% 0.121 258.9);

Tailwind

colors: {
  custom: {
    50: '#7f95c9',
    500: '#3f6cb2',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cb2;
$custom-light: #7f95c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cb2",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 178
  },
  "hsl": {
    "h": 216.522,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.53331,
    "c": 0.1212,
    "h": 258.9
  },
  "luminance": 0.14996
}

Semantic roles & 50–950 ramp

primary

#3F6CB2

secondary

#C4AD89

accent

#A350D7

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3F6CB2

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

Preview Lab → · Contrast checker → · Palette generator →