#377DB4#377DB4

#377DB4 is a mid, moderate cyan. Relative luminance 0.188; OKLCH L 57.0% C 0.110 H 245.3°. Best body text is #000000 at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#377DB4
RGB	rgb(55, 125, 180)
HSL	hsl(206, 53%, 46%)
HSV	hsv(206, 69%, 71%)
CMYK	cmyk(69.4%, 30.6%, 0%, 29.4%)
CIE-LAB	lab(50.42, -3.79, -35.43)
CIE-LCH	lch(50.42, 35.64, 263.90°)
OKLab	oklab(57.03% -0.0461 -0.1002)
OKLCH	oklch(57.03% 0.11 245.3)
XYZ	xyz(17.1443, 18.7729, 45.8912)
Luminance	0.1878 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377DB4 #B46E37

analogous

#37B4AC #377DB4 #373EB4

triadic

#377DB4 #B4377D #7DB437

tetradic

#377DB4 #AC37B4 #B46E37 #3EB437

square

#377DB4 #AC37B4 #B46E37 #3EB437

split-complementary

#377DB4 #B4373E #B4AC37

monochromatic

#1A3C56 #295C85 #377DB4 #5B9BCD #8AB8DB

Accessibility & contrast

On white

4.42

#377DB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.76

#377DB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377DB4

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377DB4	#FFFFFF	#000000	##000000
##377DB4	1.00	4.42	4.76	4.76
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.76	21.00	1.00	1.00
##000000	4.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647FB6

Deuteranopia (green-blind)

#5373B3

Tritanopia (blue-blind)

#008A90

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377db4;
/* rgb */ color: rgb(55, 125, 180);
/* oklch */ color: oklch(57.0% 0.110 245.3);

Tailwind

colors: {
  custom: {
    50: '#7ca2ca',
    500: '#377db4',
    950: '#000000',
  },
}

SCSS

$custom: #377db4;
$custom-light: #7ca2ca;
$custom-dark: #000000;

JSON

{
  "hex": "#377db4",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 180
  },
  "hsl": {
    "h": 206.4,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.57031,
    "c": 0.11031,
    "h": 245.3
  },
  "luminance": 0.18775
}

Semantic roles & 50–950 ramp

primary

#377DB4

secondary

#C69F81

accent

#8B4BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #377DB4

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

Preview Lab → · Contrast checker → · Palette generator →