#3F6DB3#3F6DB3

#3F6DB3 is a mid, vivid blue. Relative luminance 0.152; OKLCH L 53.6% C 0.121 H 258.6°. Best body text is #FFFFFF at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F6DB3
RGB	rgb(63, 109, 179)
HSL	hsl(216, 48%, 47%)
HSV	hsv(216, 65%, 70%)
CMYK	cmyk(64.8%, 39.1%, 0%, 29.8%)
CIE-LAB	lab(45.97, 6.95, -41.86)
CIE-LCH	lch(45.97, 42.43, 279.42°)
OKLab	oklab(53.62% -0.0241 -0.119)
OKLCH	oklch(53.62% 0.121 258.6)
XYZ	xyz(15.6523, 15.2472, 44.7572)
Luminance	0.1525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6DB3 #B3853F

analogous

#3FA7B3 #3F6DB3 #4B3FB3

triadic

#3F6DB3 #B33F6D #6DB33F

tetradic

#3F6DB3 #B33FA7 #B3853F #3FB34B

square

#3F6DB3 #B33FA7 #B3853F #3FB34B

split-complementary

#3F6DB3 #B34B3F #A7B33F

monochromatic

#1F3658 #2F5186 #3F6DB3 #668DC9 #93AFD9

Accessibility & contrast

On white

5.19

#3F6DB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#3F6DB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6DB3

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6DB3	#FFFFFF	#000000	##FFFFFF
##3F6DB3	1.00	5.19	4.05	5.19
#FFFFFF	5.19	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E73B6

Deuteranopia (green-blind)

#3D68B2

Tritanopia (blue-blind)

#007D87

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #3f6db3;
/* rgb */ color: rgb(63, 109, 179);
/* oklch */ color: oklch(53.6% 0.121 258.6);

Tailwind

colors: {
  custom: {
    50: '#7f96ca',
    500: '#3f6db3',
    950: '#000000',
  },
}

SCSS

$custom: #3f6db3;
$custom-light: #7f96ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6db3",
  "rgb": {
    "r": 63,
    "g": 109,
    "b": 179
  },
  "hsl": {
    "h": 216.207,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53616,
    "c": 0.12145,
    "h": 258.6
  },
  "luminance": 0.15249
}

Semantic roles & 50–950 ramp

primary

#3F6DB3

secondary

#C4AD89

accent

#A250D8

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3F6DB3

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

Preview Lab → · Contrast checker → · Palette generator →