#3F7BD5#3F7BD5

#3F7BD5 is a mid, vivid blue. Relative luminance 0.200; OKLCH L 58.8% C 0.152 H 258.4°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BD5
RGB	rgb(63, 123, 213)
HSL	hsl(216, 64%, 54%)
HSV	hsv(216, 70%, 84%)
CMYK	cmyk(70.4%, 42.3%, 0%, 16.5%)
CIE-LAB	lab(51.86, 10.41, -51.99)
CIE-LCH	lch(51.86, 53.02, 281.33°)
OKLab	oklab(58.81% -0.0304 -0.1485)
OKLCH	oklch(58.81% 0.152 258.4)
XYZ	xyz(21.1387, 20.0245, 65.6890)
Luminance	0.2003 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BD5 #D5993F

analogous

#3FC6D5 #3F7BD5 #4E3FD5

triadic

#3F7BD5 #D53F7B #7BD53F

tetradic

#3F7BD5 #D53FC6 #D5993F #3FD54E

square

#3F7BD5 #D53FC6 #D5993F #3FD54E

split-complementary

#3F7BD5 #D54E3F #C6D53F

monochromatic

#1C437E #275EB0 #3F7BD5 #719EE0 #A3C0EB

Accessibility & contrast

On white

4.20

#3F7BD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.01

#3F7BD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BD5

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BD5	#FFFFFF	#000000	##000000
##3F7BD5	1.00	4.20	5.01	5.01
#FFFFFF	4.20	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5083D8

Deuteranopia (green-blind)

#3675D3

Tritanopia (blue-blind)

#00909D

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3f7bd5;
/* rgb */ color: rgb(63, 123, 213);
/* oklch */ color: oklch(58.8% 0.152 258.4);

Tailwind

colors: {
  custom: {
    50: '#85a0e2',
    500: '#3f7bd5',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bd5;
$custom-light: #85a0e2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bd5",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 213
  },
  "hsl": {
    "h": 216,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.58806,
    "c": 0.15163,
    "h": 258.4
  },
  "luminance": 0.20027
}

Semantic roles & 50–950 ramp

primary

#3F7BD5

secondary

#D8BE98

accent

#A541E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7BD5

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

Preview Lab → · Contrast checker → · Palette generator →