#3F6CB3#3F6CB3

#3F6CB3 is a mid, vivid blue. Relative luminance 0.150; OKLCH L 53.4% C 0.123 H 259.2°. Best body text is #FFFFFF at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#3F6CB3
RGB	rgb(63, 108, 179)
HSL	hsl(217, 48%, 47%)
HSV	hsv(217, 65%, 70%)
CMYK	cmyk(64.8%, 39.7%, 0%, 29.8%)
CIE-LAB	lab(45.68, 7.57, -42.32)
CIE-LCH	lch(45.68, 42.99, 280.14°)
OKLab	oklab(53.39% -0.023 -0.1204)
OKLCH	oklch(53.39% 0.123 259.2)
XYZ	xyz(15.5462, 15.0351, 44.7219)
Luminance	0.1504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6CB3 #B3863F

analogous

#3FA6B3 #3F6CB3 #4C3FB3

triadic

#3F6CB3 #B33F6C #6CB33F

tetradic

#3F6CB3 #B33FA6 #B3863F #3FB34C

square

#3F6CB3 #B33FA6 #B3863F #3FB34C

split-complementary

#3F6CB3 #B34C3F #A6B33F

monochromatic

#1F3558 #2F5186 #3F6CB3 #668CC9 #93AED9

Accessibility & contrast

On white

5.24

#3F6CB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#3F6CB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6CB3

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6CB3	#FFFFFF	#000000	##FFFFFF
##3F6CB3	1.00	5.24	4.01	5.24
#FFFFFF	5.24	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C72B6

Deuteranopia (green-blind)

#3C67B2

Tritanopia (blue-blind)

#007C87

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3f6cb3;
/* rgb */ color: rgb(63, 108, 179);
/* oklch */ color: oklch(53.4% 0.123 259.2);

Tailwind

colors: {
  custom: {
    50: '#7f95ca',
    500: '#3f6cb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f6cb3;
$custom-light: #7f95ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6cb3",
  "rgb": {
    "r": 63,
    "g": 108,
    "b": 179
  },
  "hsl": {
    "h": 216.724,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53392,
    "c": 0.12258,
    "h": 259.2
  },
  "luminance": 0.15037
}

Semantic roles & 50–950 ramp

primary

#3F6CB3

secondary

#C4AE89

accent

#A350D8

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3F6CB3

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

Preview Lab → · Contrast checker → · Palette generator →