#377B9D#377B9D

#377B9D is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.4% C 0.086 H 233.1°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#377B9D
RGB	rgb(55, 123, 157)
HSL	hsl(200, 48%, 42%)
HSV	hsv(200, 65%, 62%)
CMYK	cmyk(65%, 21.7%, 0%, 38.4%)
CIE-LAB	lab(48.77, -10.55, -24.64)
CIE-LCH	lch(48.77, 26.80, 246.81°)
OKLab	oklab(55.38% -0.0518 -0.069)
OKLCH	oklch(55.38% 0.086 233.1)
XYZ	xyz(14.7419, 17.4110, 34.4755)
Luminance	0.1741 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377B9D #9D5937

analogous

#379D8C #377B9D #37489D

triadic

#377B9D #9D377B #7B9D37

tetradic

#377B9D #8C379D #9D5937 #489D37

square

#377B9D #8C379D #9D5937 #489D37

split-complementary

#377B9D #9D3748 #9D8C37

monochromatic

#173442 #275770 #377B9D #509CC2 #7DB5D1

Accessibility & contrast

On white

4.68

#377B9D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#377B9D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #377B9D

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377B9D	#FFFFFF	#000000	##FFFFFF
##377B9D	1.00	4.68	4.48	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A7A9F

Deuteranopia (green-blind)

#5C6F9C

Tritanopia (blue-blind)

#008486

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #377b9d;
/* rgb */ color: rgb(55, 123, 157);
/* oklch */ color: oklch(55.4% 0.086 233.1);

Tailwind

colors: {
  custom: {
    50: '#79a1ba',
    500: '#377b9d',
    950: '#000000',
  },
}

SCSS

$custom: #377b9d;
$custom-light: #79a1ba;
$custom-dark: #000000;

JSON

{
  "hex": "#377b9d",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 157
  },
  "hsl": {
    "h": 200,
    "s": 48.113,
    "l": 41.569
  },
  "oklch": {
    "l": 0.55384,
    "c": 0.08629,
    "h": 233.1
  },
  "luminance": 0.17412
}

Semantic roles & 50–950 ramp

primary

#377B9D

secondary

#BB8C75

accent

#7D50D8

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E11

muted

#7C7E80

Preview Lab

Preview with #377B9D

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

Preview Lab → · Contrast checker → · Palette generator →