#123E59#123E59

#123E59 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.8% C 0.067 H 240.0°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX#123E59
RGBrgb(18, 62, 89)
HSLhsl(203, 66%, 21%)
HSVhsv(203, 80%, 35%)
CMYKcmyk(79.8%, 30.3%, 0%, 65.1%)
CIE-LABlab(24.62, -4.51, -20.43)
CIE-LCHlch(24.62, 20.93, 257.55°)
OKLaboklab(34.8% -0.0334 -0.0577)
OKLCHoklch(34.8% 0.067 240)
XYZxyz(3.7745, 4.2947, 10.0793)
Luminance0.0430 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#123E59 #592D12
analogous
#125950 #123E59 #121A59
triadic
#123E59 #59123E #3E5912
tetradic
#123E59 #501259 #592D12 #1A5912
square
#123E59 #501259 #592D12 #1A5912
split-complementary
#123E59 #59121A #595012
monochromatic
#051219 #081B26 #123E59 #1C618C #2785BF

Accessibility & contrast

On white

11.30
#123E59 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.86
#123E59 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E59
11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##123E59#FFFFFF#000000##FFFFFF
##123E591.0011.301.8611.30
#FFFFFF11.301.0021.001.00
#0000001.8621.001.0021.00
##FFFFFF11.301.0021.001.00

Color blindness preview

Protanopia (red-blind)
#313E5A
Deuteranopia (green-blind)
#283759
Tritanopia (blue-blind)
#004547
Achromatopsia (no color)
#3A3A3A

Design tokens & code

CSS
--color: #123e59;
/* rgb */ color: rgb(18, 62, 89);
/* oklch */ color: oklch(34.8% 0.067 240.0);
Tailwind
colors: {
  custom: {
    50: '#5b7388',
    500: '#123e59',
    950: '#000000',
  },
}
SCSS
$custom: #123e59;
$custom-light: #5b7388;
$custom-dark: #000000;
JSON
{
  "hex": "#123e59",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 89
  },
  "hsl": {
    "h": 202.817,
    "s": 66.355,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34795,
    "c": 0.06669,
    "h": 240
  },
  "luminance": 0.04295
}

Semantic roles & 50–950 ramp

primary
#123E59
secondary
#925835
accent
#7F3FE9
background
#F5F6F8
surface
#E9ECEF
border
#C5C7CA
text
#04080B
muted
#797B7C

Preview Lab

Preview with #123E59

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

Preview Lab → · Contrast checker → · Palette generator →

#123E59 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva