#377B99#377B99

#377B99 is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.2% C 0.083 H 229.8°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#377B99
RGB	rgb(55, 123, 153)
HSL	hsl(198, 47%, 41%)
HSV	hsv(198, 64%, 60%)
CMYK	cmyk(64.1%, 19.6%, 0%, 40%)
CIE-LAB	lab(48.61, -11.89, -22.55)
CIE-LCH	lch(48.61, 25.49, 242.20°)
OKLab	oklab(55.2% -0.0533 -0.063)
OKLCH	oklch(55.2% 0.083 229.8)
XYZ	xyz(14.4060, 17.2766, 32.7063)
Luminance	0.1728 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377B99 #995537

analogous

#379986 #377B99 #374A99

triadic

#377B99 #99377B #7B9937

tetradic

#377B99 #863799 #995537 #4A9937

square

#377B99 #863799 #995537 #4A9937

split-complementary

#377B99 #99374A #998637

monochromatic

#17333F #27576C #377B99 #4E9DBF #7BB6D0

Accessibility & contrast

On white

4.71

#377B99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#377B99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #377B99

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377B99	#FFFFFF	#000000	##FFFFFF
##377B99	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C799A

Deuteranopia (green-blind)

#5E6F99

Tritanopia (blue-blind)

#008385

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #377b99;
/* rgb */ color: rgb(55, 123, 153);
/* oklch */ color: oklch(55.2% 0.083 229.8);

Tailwind

colors: {
  custom: {
    50: '#78a1b7',
    500: '#377b99',
    950: '#000000',
  },
}

SCSS

$custom: #377b99;
$custom-light: #78a1b7;
$custom-dark: #000000;

JSON

{
  "hex": "#377b99",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 153
  },
  "hsl": {
    "h": 198.367,
    "s": 47.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.55195,
    "c": 0.08255,
    "h": 229.8
  },
  "luminance": 0.17278
}

Semantic roles & 50–950 ramp

primary

#377B99

secondary

#B98873

accent

#7A51D7

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0F11

muted

#7C7E80

Preview Lab

Preview with #377B99

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

Preview Lab → · Contrast checker → · Palette generator →