#3778B5#3778B5

#3778B5 is a mid, moderate cyan. Relative luminance 0.176; OKLCH L 55.9% C 0.116 H 249.4°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3778B5
RGB	rgb(55, 120, 181)
HSL	hsl(209, 53%, 46%)
HSV	hsv(209, 70%, 71%)
CMYK	cmyk(69.6%, 33.7%, 0%, 29%)
CIE-LAB	lab(48.98, -0.44, -38.28)
CIE-LCH	lch(48.98, 38.28, 269.33°)
OKLab	oklab(55.92% -0.0408 -0.1085)
OKLCH	oklch(55.92% 0.116 249.4)
XYZ	xyz(16.6294, 17.5796, 46.2239)
Luminance	0.1758 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778B5 #B57437

analogous

#37B5B3 #3778B5 #3739B5

triadic

#3778B5 #B53778 #78B537

tetradic

#3778B5 #B337B5 #B57437 #39B537

square

#3778B5 #B337B5 #B57437 #39B537

split-complementary

#3778B5 #B53739 #B5B337

monochromatic

#1A3A57 #295986 #3778B5 #5C96CD #8BB4DC

Accessibility & contrast

On white

4.65

#3778B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3778B5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3778B5

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778B5	#FFFFFF	#000000	##FFFFFF
##3778B5	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7BB8

Deuteranopia (green-blind)

#4B6FB4

Tritanopia (blue-blind)

#00868E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3778b5;
/* rgb */ color: rgb(55, 120, 181);
/* oklch */ color: oklch(55.9% 0.116 249.4);

Tailwind

colors: {
  custom: {
    50: '#7c9ecb',
    500: '#3778b5',
    950: '#000000',
  },
}

SCSS

$custom: #3778b5;
$custom-light: #7c9ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#3778b5",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 181
  },
  "hsl": {
    "h": 209.048,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.55915,
    "c": 0.11594,
    "h": 249.4
  },
  "luminance": 0.17581
}

Semantic roles & 50–950 ramp

primary

#3778B5

secondary

#C6A382

accent

#924BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3778B5

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

Preview Lab → · Contrast checker → · Palette generator →