#3F78D0#3F78D0

#3F78D0 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.148 H 258.9°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F78D0
RGB	rgb(63, 120, 208)
HSL	hsl(216, 61%, 53%)
HSV	hsv(216, 70%, 82%)
CMYK	cmyk(69.7%, 42.3%, 0%, 18.4%)
CIE-LAB	lab(50.74, 10.47, -50.95)
CIE-LCH	lch(50.74, 52.02, 281.61°)
OKLab	oklab(57.84% -0.0286 -0.1456)
OKLCH	oklch(57.84% 0.148 258.9)
XYZ	xyz(20.1474, 19.0417, 62.2759)
Luminance	0.1904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78D0 #D0973F

analogous

#3FC0D0 #3F78D0 #4E3FD0

triadic

#3F78D0 #D03F78 #78D03F

tetradic

#3F78D0 #D03FC0 #D0973F #3FD04E

square

#3F78D0 #D03FC0 #D0973F #3FD04E

split-complementary

#3F78D0 #D04E3F #C0D03F

monochromatic

#1D4177 #295BA9 #3F78D0 #709BDC #A1BDE8

Accessibility & contrast

On white

4.37

#3F78D0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#3F78D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78D0

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78D0	#FFFFFF	#000000	##000000
##3F78D0	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E80D3

Deuteranopia (green-blind)

#3573CE

Tritanopia (blue-blind)

#008C9A

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f78d0;
/* rgb */ color: rgb(63, 120, 208);
/* oklch */ color: oklch(57.8% 0.148 258.9);

Tailwind

colors: {
  custom: {
    50: '#849edf',
    500: '#3f78d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f78d0;
$custom-light: #849edf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78d0",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 208
  },
  "hsl": {
    "h": 216.414,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.57839,
    "c": 0.14835,
    "h": 258.9
  },
  "luminance": 0.19044
}

Semantic roles & 50–950 ramp

primary

#3F78D0

secondary

#D5BC96

accent

#A544E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F78D0

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

Preview Lab → · Contrast checker → · Palette generator →