#3777E0#3777E0

#3777E0 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 58.4% C 0.173 H 259.9°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3777E0
RGB	rgb(55, 119, 224)
HSL	hsl(217, 73%, 55%)
HSV	hsv(217, 75%, 88%)
CMYK	cmyk(75.4%, 46.9%, 0%, 12.2%)
CIE-LAB	lab(51.13, 15.85, -59.38)
CIE-LCH	lch(51.13, 61.46, 284.95°)
OKLab	oklab(58.38% -0.0305 -0.1705)
OKLCH	oklch(58.38% 0.173 259.9)
XYZ	xyz(21.6220, 19.3852, 73.1087)
Luminance	0.1939 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777E0 #E0A037

analogous

#37CCE0 #3777E0 #4C37E0

triadic

#3777E0 #E03777 #77E037

tetradic

#3777E0 #E037CC #E0A037 #37E04C

square

#3777E0 #E037CC #E0A037 #37E04C

split-complementary

#3777E0 #E04C37 #CCE037

monochromatic

#154088 #1D5ABD #3777E0 #6C9BE8 #A1BFF0

Accessibility & contrast

On white

4.31

#3777E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#3777E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3777E0

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777E0	#FFFFFF	#000000	##000000
##3777E0	1.00	4.31	4.88	4.88
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D82E4

Deuteranopia (green-blind)

#0973DE

Tritanopia (blue-blind)

#0090A1

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3777e0;
/* rgb */ color: rgb(55, 119, 224);
/* oklch */ color: oklch(58.4% 0.173 259.9);

Tailwind

colors: {
  custom: {
    50: '#859dea',
    500: '#3777e0',
    950: '#000000',
  },
}

SCSS

$custom: #3777e0;
$custom-light: #859dea;
$custom-dark: #000000;

JSON

{
  "hex": "#3777e0",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 224
  },
  "hsl": {
    "h": 217.278,
    "s": 73.16,
    "l": 54.706
  },
  "oklch": {
    "l": 0.58378,
    "c": 0.17319,
    "h": 259.9
  },
  "luminance": 0.19388
}

Semantic roles & 50–950 ramp

primary

#3777E0

secondary

#DDC296

accent

#AA38F0

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3777E0

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

Preview Lab → · Contrast checker → · Palette generator →