#3777DD#3777DD

#3777DD is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.2% C 0.169 H 259.4°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3777DD
RGB	rgb(55, 119, 221)
HSL	hsl(217, 71%, 54%)
HSV	hsv(217, 75%, 87%)
CMYK	cmyk(75.1%, 46.2%, 0%, 13.3%)
CIE-LAB	lab(50.95, 14.75, -57.99)
CIE-LCH	lch(50.95, 59.84, 284.27°)
OKLab	oklab(58.17% -0.031 -0.1664)
OKLCH	oklch(58.17% 0.169 259.4)
XYZ	xyz(21.2188, 19.2239, 70.9849)
Luminance	0.1923 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777DD #DD9D37

analogous

#37CADD #3777DD #4A37DD

triadic

#3777DD #DD3777 #77DD37

tetradic

#3777DD #DD37CA #DD9D37 #37DD4A

square

#3777DD #DD37CA #DD9D37 #37DD4A

split-complementary

#3777DD #DD4A37 #CADD37

monochromatic

#164083 #1F5AB8 #3777DD #6B9BE6 #A0BEEF

Accessibility & contrast

On white

4.33

#3777DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#3777DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3777DD

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777DD	#FFFFFF	#000000	##000000
##3777DD	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4081E1

Deuteranopia (green-blind)

#1672DB

Tritanopia (blue-blind)

#008F9F

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3777dd;
/* rgb */ color: rgb(55, 119, 221);
/* oklch */ color: oklch(58.2% 0.169 259.4);

Tailwind

colors: {
  custom: {
    50: '#849de8',
    500: '#3777dd',
    950: '#000000',
  },
}

SCSS

$custom: #3777dd;
$custom-light: #849de8;
$custom-dark: #000000;

JSON

{
  "hex": "#3777dd",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 221
  },
  "hsl": {
    "h": 216.867,
    "s": 70.94,
    "l": 54.118
  },
  "oklch": {
    "l": 0.58174,
    "c": 0.16925,
    "h": 259.4
  },
  "luminance": 0.19226
}

Semantic roles & 50–950 ramp

primary

#3777DD

secondary

#DBC095

accent

#A83AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3777DD

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

Preview Lab → · Contrast checker → · Palette generator →