#377AA3#377AA3

#377AA3 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.4% C 0.093 H 238.5°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#377AA3
RGB	rgb(55, 122, 163)
HSL	hsl(203, 50%, 43%)
HSV	hsv(203, 66%, 64%)
CMYK	cmyk(66.3%, 25.2%, 0%, 36.1%)
CIE-LAB	lab(48.73, -7.94, -28.21)
CIE-LCH	lch(48.73, 29.31, 254.28°)
OKLab	oklab(55.43% -0.0486 -0.0793)
OKLCH	oklch(55.43% 0.093 238.5)
XYZ	xyz(15.1434, 17.3741, 37.1987)
Luminance	0.1738 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377AA3 #A36037

analogous

#37A396 #377AA3 #3744A3

triadic

#377AA3 #A3377A #7AA337

tetradic

#377AA3 #9637A3 #A36037 #44A337

square

#377AA3 #9637A3 #A36037 #44A337

split-complementary

#377AA3 #A33744 #A39637

monochromatic

#183647 #285875 #377AA3 #5299C5 #80B4D4

Accessibility & contrast

On white

4.69

#377AA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#377AA3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #377AA3

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377AA3	#FFFFFF	#000000	##FFFFFF
##377AA3	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#677AA5

Deuteranopia (green-blind)

#586FA2

Tritanopia (blue-blind)

#008488

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #377aa3;
/* rgb */ color: rgb(55, 122, 163);
/* oklch */ color: oklch(55.4% 0.093 238.5);

Tailwind

colors: {
  custom: {
    50: '#7aa0be',
    500: '#377aa3',
    950: '#000000',
  },
}

SCSS

$custom: #377aa3;
$custom-light: #7aa0be;
$custom-dark: #000000;

JSON

{
  "hex": "#377aa3",
  "rgb": {
    "r": 55,
    "g": 122,
    "b": 163
  },
  "hsl": {
    "h": 202.778,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.55433,
    "c": 0.09299,
    "h": 238.5
  },
  "luminance": 0.17376
}

Semantic roles & 50–950 ramp

primary

#377AA3

secondary

#BE9378

accent

#834FD9

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #377AA3

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

Preview Lab → · Contrast checker → · Palette generator →