#377ACC#377ACC

#377ACC is a mid, vivid cyan. Relative luminance 0.191; OKLCH L 57.7% C 0.144 H 255.1°. Best body text is #000000 at 4.82:1 contrast (WCAG AA passes).

Color values

HEX#377ACC
RGBrgb(55, 122, 204)
HSLhsl(213, 59%, 51%)
HSVhsv(213, 73%, 80%)
CMYKcmyk(73%, 40.2%, 0%, 20%)
CIE-LABlab(50.79, 6.65, -48.61)
CIE-LCHlch(50.79, 49.06, 277.79°)
OKLaboklab(57.73% -0.0369 -0.1388)
OKLCHoklch(57.73% 0.144 255.1)
XYZxyz(19.4301, 19.0888, 59.7755)
Luminance0.1909 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#377ACC #CC8937
analogous
#37C5CC #377ACC #3E37CC
triadic
#377ACC #CC377A #7ACC37
tetradic
#377ACC #CC37C5 #CC8937 #37CC3E
square
#377ACC #CC37C5 #CC8937 #37CC3E
split-complementary
#377ACC #CC3E37 #C5CC37
monochromatic
#1C406D #285D9E #377ACC #689AD8 #99BBE5

Accessibility & contrast

On white

4.36
#377ACC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

4.82
#377ACC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377ACC
4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##377ACC#FFFFFF#000000##000000
##377ACC1.004.364.824.82
#FFFFFF4.361.0021.0021.00
#0000004.8221.001.001.00
##0000004.8221.001.001.00

Color blindness preview

Protanopia (red-blind)
#5380CF
Deuteranopia (green-blind)
#3B73CA
Tritanopia (blue-blind)
#008D99
Achromatopsia (no color)
#797979

Design tokens & code

CSS
--color: #377acc;
/* rgb */ color: rgb(55, 122, 204);
/* oklch */ color: oklch(57.7% 0.144 255.1);
Tailwind
colors: {
  custom: {
    50: '#819fdc',
    500: '#377acc',
    950: '#000000',
  },
}
SCSS
$custom: #377acc;
$custom-light: #819fdc;
$custom-dark: #000000;
JSON
{
  "hex": "#377acc",
  "rgb": {
    "r": 55,
    "g": 122,
    "b": 204
  },
  "hsl": {
    "h": 213.02,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.57729,
    "c": 0.14357,
    "h": 255.1
  },
  "luminance": 0.19091
}

Semantic roles & 50–950 ramp

primary
#377ACC
secondary
#D0B38E
accent
#9C45E3
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #377ACC

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

Preview Lab → · Contrast checker → · Palette generator →

#377ACC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva