#377D99#377D99

#377D99 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 55.7% C 0.082 H 227.4°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#377D99
RGB	rgb(55, 125, 153)
HSL	hsl(197, 47%, 41%)
HSV	hsv(197, 64%, 60%)
CMYK	cmyk(64.1%, 18.3%, 0%, 40%)
CIE-LAB	lab(49.23, -13.02, -21.60)
CIE-LCH	lch(49.23, 25.22, 238.92°)
OKLab	oklab(55.69% -0.0555 -0.0603)
OKLCH	oklch(55.69% 0.082 227.4)
XYZ	xyz(14.6567, 17.7779, 32.7899)
Luminance	0.1778 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377D99 #995337

analogous

#379984 #377D99 #374C99

triadic

#377D99 #99377D #7D9937

tetradic

#377D99 #843799 #995337 #4C9937

square

#377D99 #843799 #995337 #4C9937

split-complementary

#377D99 #99374C #998437

monochromatic

#17333F #27586C #377D99 #4E9FBF #7BB7D0

Accessibility & contrast

On white

4.61

#377D99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#377D99 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #377D99

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377D99	#FFFFFF	#000000	##FFFFFF
##377D99	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E7B9A

Deuteranopia (green-blind)

#607199

Tritanopia (blue-blind)

#008586

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #377d99;
/* rgb */ color: rgb(55, 125, 153);
/* oklch */ color: oklch(55.7% 0.082 227.4);

Tailwind

colors: {
  custom: {
    50: '#78a2b7',
    500: '#377d99',
    950: '#000000',
  },
}

SCSS

$custom: #377d99;
$custom-light: #78a2b7;
$custom-dark: #000000;

JSON

{
  "hex": "#377d99",
  "rgb": {
    "r": 55,
    "g": 125,
    "b": 153
  },
  "hsl": {
    "h": 197.143,
    "s": 47.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.55689,
    "c": 0.08198,
    "h": 227.4
  },
  "luminance": 0.17779
}

Semantic roles & 50–950 ramp

primary

#377D99

secondary

#B98773

accent

#7751D7

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #377D99

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

Preview Lab → · Contrast checker → · Palette generator →