#3F7BD3#3F7BD3

#3F7BD3 is a mid, vivid blue. Relative luminance 0.199; OKLCH L 58.7% C 0.149 H 258.1°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BD3
RGB	rgb(63, 123, 211)
HSL	hsl(216, 63%, 54%)
HSV	hsv(216, 70%, 83%)
CMYK	cmyk(70.1%, 41.7%, 0%, 17.3%)
CIE-LAB	lab(51.75, 9.70, -51.04)
CIE-LCH	lch(51.75, 51.95, 280.76°)
OKLab	oklab(58.68% -0.0308 -0.1458)
OKLCH	oklch(58.68% 0.149 258.1)
XYZ	xyz(20.8865, 19.9236, 64.3603)
Luminance	0.1993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BD3 #D3973F

analogous

#3FC5D3 #3F7BD3 #4D3FD3

triadic

#3F7BD3 #D33F7B #7BD33F

tetradic

#3F7BD3 #D33FC5 #D3973F #3FD34D

square

#3F7BD3 #D33FC5 #D3973F #3FD34D

split-complementary

#3F7BD3 #D34D3F #C5D33F

monochromatic

#1C437B #285EAD #3F7BD3 #719DDE #A3BFEA

Accessibility & contrast

On white

4.21

#3F7BD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#3F7BD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BD3

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BD3	#FFFFFF	#000000	##000000
##3F7BD3	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5183D6

Deuteranopia (green-blind)

#3875D1

Tritanopia (blue-blind)

#008F9D

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3f7bd3;
/* rgb */ color: rgb(63, 123, 211);
/* oklch */ color: oklch(58.7% 0.149 258.1);

Tailwind

colors: {
  custom: {
    50: '#85a0e1',
    500: '#3f7bd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bd3;
$custom-light: #85a0e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bd3",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 211
  },
  "hsl": {
    "h": 215.676,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.58681,
    "c": 0.14898,
    "h": 258.1
  },
  "luminance": 0.19926
}

Semantic roles & 50–950 ramp

primary

#3F7BD3

secondary

#D7BD97

accent

#A342E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7BD3

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

Preview Lab → · Contrast checker → · Palette generator →