#3778E0#3778E0

#3778E0 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.6% C 0.172 H 259.5°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#3778E0
RGB	rgb(55, 120, 224)
HSL	hsl(217, 73%, 55%)
HSV	hsv(217, 75%, 88%)
CMYK	cmyk(75.4%, 46.4%, 0%, 12.2%)
CIE-LAB	lab(51.41, 15.23, -58.94)
CIE-LCH	lch(51.41, 60.88, 284.49°)
OKLab	oklab(58.59% -0.0313 -0.1692)
OKLCH	oklch(58.59% 0.172 259.5)
XYZ	xyz(21.7417, 19.6245, 73.1486)
Luminance	0.1963 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778E0 #E09F37

analogous

#37CDE0 #3778E0 #4B37E0

triadic

#3778E0 #E03778 #78E037

tetradic

#3778E0 #E037CD #E09F37 #37E04B

square

#3778E0 #E037CD #E09F37 #37E04B

split-complementary

#3778E0 #E04B37 #CDE037

monochromatic

#154188 #1D5BBD #3778E0 #6C9CE8 #A1C0F0

Accessibility & contrast

On white

4.26

#3778E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#3778E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778E0

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778E0	#FFFFFF	#000000	##000000
##3778E0	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4083E4

Deuteranopia (green-blind)

#1173DE

Tritanopia (blue-blind)

#0091A1

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3778e0;
/* rgb */ color: rgb(55, 120, 224);
/* oklch */ color: oklch(58.6% 0.172 259.5);

Tailwind

colors: {
  custom: {
    50: '#859eea',
    500: '#3778e0',
    950: '#000000',
  },
}

SCSS

$custom: #3778e0;
$custom-light: #859eea;
$custom-dark: #000000;

JSON

{
  "hex": "#3778e0",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 224
  },
  "hsl": {
    "h": 216.923,
    "s": 73.16,
    "l": 54.706
  },
  "oklch": {
    "l": 0.58589,
    "c": 0.17204,
    "h": 259.5
  },
  "luminance": 0.19627
}

Semantic roles & 50–950 ramp

primary

#3778E0

secondary

#DDC296

accent

#A938F0

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3778E0

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

Preview Lab → · Contrast checker → · Palette generator →