#3F6BB3#3F6BB3

#3F6BB3 is a mid, vivid blue. Relative luminance 0.148; OKLCH L 53.2% C 0.124 H 259.8°. Best body text is #FFFFFF at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F6BB3
RGB	rgb(63, 107, 179)
HSL	hsl(217, 48%, 47%)
HSV	hsv(217, 65%, 70%)
CMYK	cmyk(64.8%, 40.2%, 0%, 29.8%)
CIE-LAB	lab(45.39, 8.20, -42.78)
CIE-LCH	lch(45.39, 43.56, 280.85°)
OKLab	oklab(53.17% -0.022 -0.1218)
OKLCH	oklch(53.17% 0.124 259.8)
XYZ	xyz(15.4414, 14.8254, 44.6869)
Luminance	0.1483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F6BB3 #B3873F

analogous

#3FA5B3 #3F6BB3 #4D3FB3

triadic

#3F6BB3 #B33F6B #6BB33F

tetradic

#3F6BB3 #B33FA5 #B3873F #3FB34D

square

#3F6BB3 #B33FA5 #B3873F #3FB34D

split-complementary

#3F6BB3 #B34D3F #A5B33F

monochromatic

#1F3558 #2F5086 #3F6BB3 #668CC9 #93AED9

Accessibility & contrast

On white

5.30

#3F6BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.97

#3F6BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F6BB3

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F6BB3	#FFFFFF	#000000	##FFFFFF
##3F6BB3	1.00	5.30	3.97	5.30
#FFFFFF	5.30	1.00	21.00	1.00
#000000	3.97	21.00	1.00	21.00
##FFFFFF	5.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B71B6

Deuteranopia (green-blind)

#3A66B2

Tritanopia (blue-blind)

#007B86

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3f6bb3;
/* rgb */ color: rgb(63, 107, 179);
/* oklch */ color: oklch(53.2% 0.124 259.8);

Tailwind

colors: {
  custom: {
    50: '#7f94ca',
    500: '#3f6bb3',
    950: '#000000',
  },
}

SCSS

$custom: #3f6bb3;
$custom-light: #7f94ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f6bb3",
  "rgb": {
    "r": 63,
    "g": 107,
    "b": 179
  },
  "hsl": {
    "h": 217.241,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.53169,
    "c": 0.12373,
    "h": 259.8
  },
  "luminance": 0.14827
}

Semantic roles & 50–950 ramp

primary

#3F6BB3

secondary

#C4AE89

accent

#A450D8

background

#F8F9FC

surface

#EFF1F8

border

#CACBD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3F6BB3

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

Preview Lab → · Contrast checker → · Palette generator →