#3777DF#3777DF

#3777DF is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.3% C 0.172 H 259.7°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3777DF
RGB	rgb(55, 119, 223)
HSL	hsl(217, 72%, 55%)
HSV	hsv(217, 75%, 87%)
CMYK	cmyk(75.3%, 46.6%, 0%, 12.5%)
CIE-LAB	lab(51.07, 15.48, -58.92)
CIE-LCH	lch(51.07, 60.92, 284.72°)
OKLab	oklab(58.31% -0.0307 -0.1691)
OKLCH	oklch(58.31% 0.172 259.7)
XYZ	xyz(21.4868, 19.3311, 72.3966)
Luminance	0.1933 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777DF #DF9F37

analogous

#37CBDF #3777DF #4B37DF

triadic

#3777DF #DF3777 #77DF37

tetradic

#3777DF #DF37CB #DF9F37 #37DF4B

square

#3777DF #DF37CB #DF9F37 #37DF4B

split-complementary

#3777DF #DF4B37 #CBDF37

monochromatic

#154086 #1E5ABB #3777DF #6C9BE7 #A1BFF0

Accessibility & contrast

On white

4.31

#3777DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#3777DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3777DF

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777DF	#FFFFFF	#000000	##000000
##3777DF	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E82E3

Deuteranopia (green-blind)

#0E72DD

Tritanopia (blue-blind)

#0090A0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3777df;
/* rgb */ color: rgb(55, 119, 223);
/* oklch */ color: oklch(58.3% 0.172 259.7);

Tailwind

colors: {
  custom: {
    50: '#849dea',
    500: '#3777df',
    950: '#000000',
  },
}

SCSS

$custom: #3777df;
$custom-light: #849dea;
$custom-dark: #000000;

JSON

{
  "hex": "#3777df",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 223
  },
  "hsl": {
    "h": 217.143,
    "s": 72.414,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58309,
    "c": 0.17188,
    "h": 259.7
  },
  "luminance": 0.19334
}

Semantic roles & 50–950 ramp

primary

#3777DF

secondary

#DCC195

accent

#AA39EF

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3777DF

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

Preview Lab → · Contrast checker → · Palette generator →