#377CB2#377CB2

#377CB2 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.7% C 0.109 H 245.1°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#377CB2
RGB	rgb(55, 124, 178)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 69%, 70%)
CMYK	cmyk(69.1%, 30.3%, 0%, 30.2%)
CIE-LAB	lab(50.03, -3.90, -34.90)
CIE-LCH	lch(50.03, 35.12, 263.62°)
OKLab	oklab(56.69% -0.0457 -0.0986)
OKLCH	oklch(56.69% 0.109 245.1)
XYZ	xyz(16.8160, 18.4401, 44.7839)
Luminance	0.1844 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CB2 #B26D37

analogous

#37B2AA #377CB2 #373FB2

triadic

#377CB2 #B2377C #7CB237

tetradic

#377CB2 #AA37B2 #B26D37 #3FB237

square

#377CB2 #AA37B2 #B26D37 #3FB237

split-complementary

#377CB2 #B2373F #B2AA37

monochromatic

#1A3B54 #295B83 #377CB2 #5A9ACC #89B7DB

Accessibility & contrast

On white

4.48

#377CB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#377CB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CB2

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CB2	#FFFFFF	#000000	##000000
##377CB2	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647EB4

Deuteranopia (green-blind)

#5372B1

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377cb2;
/* rgb */ color: rgb(55, 124, 178);
/* oklch */ color: oklch(56.7% 0.109 245.1);

Tailwind

colors: {
  custom: {
    50: '#7ca1c9',
    500: '#377cb2',
    950: '#000000',
  },
}

SCSS

$custom: #377cb2;
$custom-light: #7ca1c9;
$custom-dark: #000000;

JSON

{
  "hex": "#377cb2",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 178
  },
  "hsl": {
    "h": 206.341,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.56688,
    "c": 0.10873,
    "h": 245.1
  },
  "luminance": 0.18442
}

Semantic roles & 50–950 ramp

primary

#377CB2

secondary

#C59E80

accent

#8B4CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #377CB2

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

Preview Lab → · Contrast checker → · Palette generator →