#3F7CD3#3F7CD3

#3F7CD3 is a mid, vivid blue. Relative luminance 0.202; OKLCH L 58.9% C 0.148 H 257.6°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F7CD3
RGB	rgb(63, 124, 211)
HSL	hsl(215, 63%, 54%)
HSV	hsv(215, 70%, 83%)
CMYK	cmyk(70.1%, 41.2%, 0%, 17.3%)
CIE-LAB	lab(52.03, 9.08, -50.59)
CIE-LCH	lch(52.03, 51.40, 280.18°)
OKLab	oklab(58.9% -0.0317 -0.1444)
OKLCH	oklch(58.9% 0.148 257.6)
XYZ	xyz(21.0111, 20.1730, 64.4018)
Luminance	0.2018 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7CD3 #D3963F

analogous

#3FC6D3 #3F7CD3 #4C3FD3

triadic

#3F7CD3 #D33F7C #7CD33F

tetradic

#3F7CD3 #D33FC6 #D3963F #3FD34C

square

#3F7CD3 #D33FC6 #D3963F #3FD34C

split-complementary

#3F7CD3 #D34C3F #C6D33F

monochromatic

#1C437B #285FAD #3F7CD3 #719EDE #A3C0EA

Accessibility & contrast

On white

4.17

#3F7CD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#3F7CD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7CD3

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7CD3	#FFFFFF	#000000	##000000
##3F7CD3	1.00	4.17	5.04	5.04
#FFFFFF	4.17	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5383D6

Deuteranopia (green-blind)

#3B76D1

Tritanopia (blue-blind)

#00909D

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #3f7cd3;
/* rgb */ color: rgb(63, 124, 211);
/* oklch */ color: oklch(58.9% 0.148 257.6);

Tailwind

colors: {
  custom: {
    50: '#85a1e1',
    500: '#3f7cd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f7cd3;
$custom-light: #85a1e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7cd3",
  "rgb": {
    "r": 63,
    "g": 124,
    "b": 211
  },
  "hsl": {
    "h": 215.27,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.58899,
    "c": 0.14786,
    "h": 257.6
  },
  "luminance": 0.20175
}

Semantic roles & 50–950 ramp

primary

#3F7CD3

secondary

#D7BC97

accent

#A242E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F7CD3

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

Preview Lab → · Contrast checker → · Palette generator →