#3778DF#3778DF

#3778DF is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.5% C 0.171 H 259.4°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3778DF
RGB	rgb(55, 120, 223)
HSL	hsl(217, 72%, 55%)
HSV	hsv(217, 75%, 87%)
CMYK	cmyk(75.3%, 46.2%, 0%, 12.5%)
CIE-LAB	lab(51.35, 14.86, -58.48)
CIE-LCH	lch(51.35, 60.34, 284.26°)
OKLab	oklab(58.52% -0.0315 -0.1678)
OKLCH	oklch(58.52% 0.171 259.4)
XYZ	xyz(21.6065, 19.5704, 72.4365)
Luminance	0.1957 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778DF #DF9E37

analogous

#37CCDF #3778DF #4A37DF

triadic

#3778DF #DF3778 #78DF37

tetradic

#3778DF #DF37CC #DF9E37 #37DF4A

square

#3778DF #DF37CC #DF9E37 #37DF4A

split-complementary

#3778DF #DF4A37 #CCDF37

monochromatic

#154186 #1E5BBB #3778DF #6C9CE7 #A1BFF0

Accessibility & contrast

On white

4.27

#3778DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#3778DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778DF

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778DF	#FFFFFF	#000000	##000000
##3778DF	1.00	4.27	4.91	4.91
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4183E3

Deuteranopia (green-blind)

#1573DD

Tritanopia (blue-blind)

#0090A1

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3778df;
/* rgb */ color: rgb(55, 120, 223);
/* oklch */ color: oklch(58.5% 0.171 259.4);

Tailwind

colors: {
  custom: {
    50: '#849eea',
    500: '#3778df',
    950: '#000000',
  },
}

SCSS

$custom: #3778df;
$custom-light: #849eea;
$custom-dark: #000000;

JSON

{
  "hex": "#3778df",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 223
  },
  "hsl": {
    "h": 216.786,
    "s": 72.414,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58522,
    "c": 0.17073,
    "h": 259.4
  },
  "luminance": 0.19573
}

Semantic roles & 50–950 ramp

primary

#3778DF

secondary

#DCC195

accent

#A939EF

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3778DF

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

Preview Lab → · Contrast checker → · Palette generator →