#3778DA#3778DA

#3778DA is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.2% C 0.164 H 258.6°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#3778DA
RGB	rgb(55, 120, 218)
HSL	hsl(216, 69%, 54%)
HSV	hsv(216, 75%, 85%)
CMYK	cmyk(74.8%, 45%, 0%, 14.5%)
CIE-LAB	lab(51.04, 13.02, -56.15)
CIE-LCH	lch(51.04, 57.64, 283.06°)
OKLab	oklab(58.19% -0.0323 -0.1609)
OKLCH	oklch(58.19% 0.164 258.6)
XYZ	xyz(20.9423, 19.3048, 68.9385)
Luminance	0.1931 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778DA #DA9937

analogous

#37C9DA #3778DA #4737DA

triadic

#3778DA #DA3778 #78DA37

tetradic

#3778DA #DA37C9 #DA9937 #37DA47

square

#3778DA #DA37C9 #DA9937 #37DA47

split-complementary

#3778DA #DA4737 #C9DA37

monochromatic

#18417F #215BB3 #3778DA #6B9BE4 #9EBEED

Accessibility & contrast

On white

4.32

#3778DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#3778DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778DA

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778DA	#FFFFFF	#000000	##000000
##3778DA	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4582DE

Deuteranopia (green-blind)

#2273D8

Tritanopia (blue-blind)

#008F9E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3778da;
/* rgb */ color: rgb(55, 120, 218);
/* oklch */ color: oklch(58.2% 0.164 258.6);

Tailwind

colors: {
  custom: {
    50: '#839ee6',
    500: '#3778da',
    950: '#000000',
  },
}

SCSS

$custom: #3778da;
$custom-light: #839ee6;
$custom-dark: #000000;

JSON

{
  "hex": "#3778da",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 218
  },
  "hsl": {
    "h": 216.074,
    "s": 68.776,
    "l": 53.529
  },
  "oklch": {
    "l": 0.58187,
    "c": 0.16416,
    "h": 258.6
  },
  "luminance": 0.19307
}

Semantic roles & 50–950 ramp

primary

#3778DA

secondary

#D9BD93

accent

#A63CEC

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3778DA

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

Preview Lab → · Contrast checker → · Palette generator →