#3778B8#3778B8

#3778B8 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 56.1% C 0.120 H 250.5°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3778B8
RGB	rgb(55, 120, 184)
HSL	hsl(210, 54%, 47%)
HSV	hsv(210, 70%, 72%)
CMYK	cmyk(70.1%, 34.8%, 0%, 27.8%)
CIE-LAB	lab(49.14, 0.63, -39.77)
CIE-LCH	lch(49.14, 39.77, 270.91°)
OKLab	oklab(56.08% -0.0399 -0.1129)
OKLCH	oklch(56.08% 0.12 250.5)
XYZ	xyz(16.9405, 17.7040, 47.8625)
Luminance	0.1771 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778B8 #B87737

analogous

#37B8B8 #3778B8 #3738B8

triadic

#3778B8 #B83778 #78B837

tetradic

#3778B8 #B837B8 #B87737 #38B837

square

#3778B8 #B837B8 #B87737 #38B837

split-complementary

#3778B8 #B83738 #B8B837

monochromatic

#1B3B5A #295989 #3778B8 #5D97CF #8DB5DD

Accessibility & contrast

On white

4.62

#3778B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3778B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3778B8

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778B8	#FFFFFF	#000000	##FFFFFF
##3778B8	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7BBB

Deuteranopia (green-blind)

#496FB7

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3778b8;
/* rgb */ color: rgb(55, 120, 184);
/* oklch */ color: oklch(56.1% 0.120 250.5);

Tailwind

colors: {
  custom: {
    50: '#7d9ecd',
    500: '#3778b8',
    950: '#000000',
  },
}

SCSS

$custom: #3778b8;
$custom-light: #7d9ecd;
$custom-dark: #000000;

JSON

{
  "hex": "#3778b8",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 184
  },
  "hsl": {
    "h": 209.767,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.56085,
    "c": 0.11975,
    "h": 250.5
  },
  "luminance": 0.17706
}

Semantic roles & 50–950 ramp

primary

#3778B8

secondary

#C7A584

accent

#934ADD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3778B8

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

Preview Lab → · Contrast checker → · Palette generator →