#377EA1#377EA1

#377EA1 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.3% C 0.089 H 232.9°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#377EA1
RGB	rgb(55, 126, 161)
HSL	hsl(200, 49%, 42%)
HSV	hsv(200, 66%, 63%)
CMYK	cmyk(65.8%, 21.7%, 0%, 36.9%)
CIE-LAB	lab(49.86, -10.92, -25.28)
CIE-LCH	lch(49.86, 27.54, 246.64°)
OKLab	oklab(56.31% -0.0536 -0.0708)
OKLCH	oklch(56.31% 0.089 232.9)
XYZ	xyz(15.4669, 18.3055, 36.4295)
Luminance	0.1831 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EA1 #A15A37

analogous

#37A18F #377EA1 #3749A1

triadic

#377EA1 #A1377E #7EA137

tetradic

#377EA1 #8F37A1 #A15A37 #49A137

square

#377EA1 #8F37A1 #A15A37 #49A137

split-complementary

#377EA1 #A13749 #A18F37

monochromatic

#183746 #275A73 #377EA1 #519EC4 #7FB8D3

Accessibility & contrast

On white

4.51

#377EA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#377EA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EA1

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EA1	#FFFFFF	#000000	##000000
##377EA1	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7DA3

Deuteranopia (green-blind)

#5E72A0

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377ea1;
/* rgb */ color: rgb(55, 126, 161);
/* oklch */ color: oklch(56.3% 0.089 232.9);

Tailwind

colors: {
  custom: {
    50: '#79a3bd',
    500: '#377ea1',
    950: '#000000',
  },
}

SCSS

$custom: #377ea1;
$custom-light: #79a3bd;
$custom-dark: #000000;

JSON

{
  "hex": "#377ea1",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 161
  },
  "hsl": {
    "h": 199.811,
    "s": 49.074,
    "l": 42.353
  },
  "oklch": {
    "l": 0.56308,
    "c": 0.08884,
    "h": 232.9
  },
  "luminance": 0.18307
}

Semantic roles & 50–950 ramp

primary

#377EA1

secondary

#BD8E77

accent

#7D4FD9

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #377EA1

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

Preview Lab → · Contrast checker → · Palette generator →