#377AE0#377AE0

#377AE0 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 59.0% C 0.170 H 258.8°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).

Color values

HEX#377AE0
RGBrgb(55, 122, 224)
HSLhsl(216, 73%, 55%)
HSVhsv(216, 75%, 88%)
CMYKcmyk(75.4%, 45.5%, 0%, 12.2%)
CIE-LABlab(51.96, 13.98, -58.05)
CIE-LCHlch(51.96, 59.71, 283.54°)
OKLaboklab(59.01% -0.0329 -0.1665)
OKLCHoklch(59.01% 0.17 258.8)
XYZxyz(21.9847, 20.1106, 73.2296)
Luminance0.2011 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#377AE0 #E09D37
analogous
#37CFE0 #377AE0 #4937E0
triadic
#377AE0 #E0377A #7AE037
tetradic
#377AE0 #E037CF #E09D37 #37E049
square
#377AE0 #E037CF #E09D37 #37E049
split-complementary
#377AE0 #E04937 #CFE037
monochromatic
#154288 #1D5CBD #377AE0 #6C9DE8 #A1C0F0

Accessibility & contrast

On white

4.18
#377AE0 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.02
#377AE0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377AE0
5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##377AE0#FFFFFF#000000##000000
##377AE01.004.185.025.02
#FFFFFF4.181.0021.0021.00
#0000005.0221.001.001.00
##0000005.0221.001.001.00

Color blindness preview

Protanopia (red-blind)
#4484E4
Deuteranopia (green-blind)
#1C75DE
Tritanopia (blue-blind)
#0092A2
Achromatopsia (no color)
#7C7C7C

Design tokens & code

CSS
--color: #377ae0;
/* rgb */ color: rgb(55, 122, 224);
/* oklch */ color: oklch(59.0% 0.170 258.8);
Tailwind
colors: {
  custom: {
    50: '#859fea',
    500: '#377ae0',
    950: '#000000',
  },
}
SCSS
$custom: #377ae0;
$custom-light: #859fea;
$custom-dark: #000000;
JSON
{
  "hex": "#377ae0",
  "rgb": {
    "r": 55,
    "g": 122,
    "b": 224
  },
  "hsl": {
    "h": 216.213,
    "s": 73.16,
    "l": 54.706
  },
  "oklch": {
    "l": 0.59014,
    "c": 0.16974,
    "h": 258.8
  },
  "luminance": 0.20113
}

Semantic roles & 50–950 ramp

primary
#377AE0
secondary
#DDC196
accent
#A738F0
background
#F8F9FE
surface
#F0F2FD
border
#CBCCD5
text
#0D0E16
muted
#7D7E84

Preview Lab

Preview with #377AE0

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

Preview Lab → · Contrast checker → · Palette generator →

#377AE0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva