#3F6FBC#3F6FBC

#3F6FBC is a mid, vivid blue. Relative luminance 0.161; OKLCH L 54.6% C 0.132 H 259.4°. Best body text is #FFFFFF at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#3F6FBC
RGB	rgb(63, 111, 188)
HSL	hsl(217, 50%, 49%)
HSV	hsv(217, 66%, 74%)
CMYK	cmyk(66.5%, 41%, 0%, 26.3%)
CIE-LAB	lab(47.05, 8.90, -45.37)
CIE-LCH	lch(47.05, 46.24, 281.10°)
OKLab	oklab(54.61% -0.0241 -0.1293)
OKLCH	oklch(54.61% 0.132 259.4)
XYZ	xyz(16.8082, 16.0548, 49.7803)
Luminance	0.1606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6FBC #BC8C3F

analogous

#3FAEBC #3F6FBC #4E3FBC

triadic

#3F6FBC #BC3F6F #6FBC3F

tetradic

#3F6FBC #BC3FAE #BC8C3F #3FBC4E

square

#3F6FBC #BC3FAE #BC8C3F #3FBC4E

split-complementary

#3F6FBC #BC4E3F #AEBC3F

monochromatic

#203960 #30548E #3F6FBC #6B91CD #99B3DD

Accessibility & contrast

On white

4.99

#3F6FBC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.21

#3F6FBC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6FBC

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6FBC	#FFFFFF	#000000	##FFFFFF
##3F6FBC	1.00	4.99	4.21	4.99
#FFFFFF	4.99	1.00	21.00	1.00
#000000	4.21	21.00	1.00	21.00
##FFFFFF	4.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C76BF

Deuteranopia (green-blind)

#396ABA

Tritanopia (blue-blind)

#00818C

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f6fbc;
/* rgb */ color: rgb(63, 111, 188);
/* oklch */ color: oklch(54.6% 0.132 259.4);

Tailwind

colors: {
  custom: {
    50: '#8197d0',
    500: '#3f6fbc',
    950: '#000000',
  },
}

SCSS

$custom: #3f6fbc;
$custom-light: #8197d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6fbc",
  "rgb": {
    "r": 63,
    "g": 111,
    "b": 188
  },
  "hsl": {
    "h": 216.96,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.54613,
    "c": 0.13154,
    "h": 259.4
  },
  "luminance": 0.16056
}

Semantic roles & 50–950 ramp

primary

#3F6FBC

secondary

#C9B28E

accent

#A44ED9

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3F6FBC

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

Preview Lab → · Contrast checker → · Palette generator →