#377BB2#377BB2

#377BB2 is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.5% C 0.110 H 245.9°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#377BB2
RGB	rgb(55, 123, 178)
HSL	hsl(207, 53%, 46%)
HSV	hsv(207, 69%, 70%)
CMYK	cmyk(69.1%, 30.9%, 0%, 30.2%)
CIE-LAB	lab(49.73, -3.31, -35.37)
CIE-LCH	lch(49.73, 35.52, 264.66°)
OKLab	oklab(56.45% -0.0447 -0.1)
OKLCH	oklch(56.45% 0.11 245.9)
XYZ	xyz(16.6913, 18.1907, 44.7423)
Luminance	0.1819 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BB2 #B26E37

analogous

#37B2AB #377BB2 #373DB2

triadic

#377BB2 #B2377B #7BB237

tetradic

#377BB2 #AB37B2 #B26E37 #3DB237

square

#377BB2 #AB37B2 #B26E37 #3DB237

split-complementary

#377BB2 #B2373D #B2AB37

monochromatic

#1A3A54 #295B83 #377BB2 #5A99CC #89B6DB

Accessibility & contrast

On white

4.53

#377BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#377BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BB2

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BB2	#FFFFFF	#000000	##000000
##377BB2	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627DB4

Deuteranopia (green-blind)

#5171B1

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #377bb2;
/* rgb */ color: rgb(55, 123, 178);
/* oklch */ color: oklch(56.5% 0.110 245.9);

Tailwind

colors: {
  custom: {
    50: '#7ca0c9',
    500: '#377bb2',
    950: '#000000',
  },
}

SCSS

$custom: #377bb2;
$custom-light: #7ca0c9;
$custom-dark: #000000;

JSON

{
  "hex": "#377bb2",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 178
  },
  "hsl": {
    "h": 206.829,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.56452,
    "c": 0.10957,
    "h": 245.9
  },
  "luminance": 0.18192
}

Semantic roles & 50–950 ramp

primary

#377BB2

secondary

#C59F80

accent

#8C4CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #377BB2

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

Preview Lab → · Contrast checker → · Palette generator →