#377EA3#377EA3

#377EA3 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.4% C 0.091 H 234.4°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#377EA3
RGB	rgb(55, 126, 163)
HSL	hsl(201, 50%, 43%)
HSV	hsv(201, 66%, 64%)
CMYK	cmyk(66.3%, 22.7%, 0%, 36.1%)
CIE-LAB	lab(49.95, -10.25, -26.32)
CIE-LCH	lch(49.95, 28.24, 248.72°)
OKLab	oklab(56.4% -0.0529 -0.0738)
OKLCH	oklch(56.4% 0.091 234.4)
XYZ	xyz(15.6447, 18.3766, 37.3658)
Luminance	0.1838 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EA3 #A35C37

analogous

#37A392 #377EA3 #3748A3

triadic

#377EA3 #A3377E #7EA337

tetradic

#377EA3 #9237A3 #A35C37 #48A337

square

#377EA3 #9237A3 #A35C37 #48A337

split-complementary

#377EA3 #A33748 #A39237

monochromatic

#183747 #285B75 #377EA3 #529EC5 #80B7D4

Accessibility & contrast

On white

4.49

#377EA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#377EA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EA3

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EA3	#FFFFFF	#000000	##000000
##377EA3	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C7DA5

Deuteranopia (green-blind)

#5D72A2

Tritanopia (blue-blind)

#00888A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377ea3;
/* rgb */ color: rgb(55, 126, 163);
/* oklch */ color: oklch(56.4% 0.091 234.4);

Tailwind

colors: {
  custom: {
    50: '#7aa3be',
    500: '#377ea3',
    950: '#000000',
  },
}

SCSS

$custom: #377ea3;
$custom-light: #7aa3be;
$custom-dark: #000000;

JSON

{
  "hex": "#377ea3",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 163
  },
  "hsl": {
    "h": 200.556,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.56404,
    "c": 0.0908,
    "h": 234.4
  },
  "luminance": 0.18378
}

Semantic roles & 50–950 ramp

primary

#377EA3

secondary

#BE9078

accent

#7E4FD9

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #377EA3

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

Preview Lab → · Contrast checker → · Palette generator →