#123F5E#123F5E

#123F5E is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.4% C 0.072 H 243.1°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX#123F5E
RGBrgb(18, 63, 94)
HSLhsl(204, 68%, 22%)
HSVhsv(204, 81%, 37%)
CMYKcmyk(80.9%, 33%, 0%, 63.1%)
CIE-LABlab(25.23, -3.14, -22.73)
CIE-LCHlch(25.23, 22.95, 262.14°)
OKLaboklab(35.37% -0.0327 -0.0644)
OKLCHoklch(35.37% 0.072 243.1)
XYZxyz(4.0466, 4.4913, 11.2411)
Luminance0.0449 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#123F5E #5E3112
analogous
#125E57 #123F5E #12195E
triadic
#123F5E #5E123F #3F5E12
tetradic
#123F5E #57125E #5E3112 #195E12
square
#123F5E #57125E #5E3112 #195E12
split-complementary
#123F5E #5E1219 #5E5712
monochromatic
#05111A #081D2B #123F5E #1C6191 #2684C5

Accessibility & contrast

On white

11.06
#123F5E on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.90
#123F5E on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F5E
11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##123F5E#FFFFFF#000000##FFFFFF
##123F5E1.0011.061.9011.06
#FFFFFF11.061.0021.001.00
#0000001.9021.001.0021.00
##FFFFFF11.061.0021.001.00

Color blindness preview

Protanopia (red-blind)
#31405F
Deuteranopia (green-blind)
#26395D
Tritanopia (blue-blind)
#00474A
Achromatopsia (no color)
#3C3C3C

Design tokens & code

CSS
--color: #123f5e;
/* rgb */ color: rgb(18, 63, 94);
/* oklch */ color: oklch(35.4% 0.072 243.1);
Tailwind
colors: {
  custom: {
    50: '#5c738c',
    500: '#123f5e',
    950: '#000000',
  },
}
SCSS
$custom: #123f5e;
$custom-light: #5c738c;
$custom-dark: #000000;
JSON
{
  "hex": "#123f5e",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 94
  },
  "hsl": {
    "h": 204.474,
    "s": 67.857,
    "l": 21.961
  },
  "oklch": {
    "l": 0.35368,
    "c": 0.07221,
    "h": 243.1
  },
  "luminance": 0.04492
}

Semantic roles & 50–950 ramp

primary
#123F5E
secondary
#965D35
accent
#843DEB
background
#F5F7F8
surface
#E9EDF0
border
#C5C8CB
text
#05080C
muted
#797B7D

Preview Lab

Preview with #123F5E

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

Preview Lab → · Contrast checker → · Palette generator →

#123F5E Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva