#123F4A#123F4A

#123F4A is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.3% C 0.051 H 217.2°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#123F4A
RGB	rgb(18, 63, 74)
HSL	hsl(192, 61%, 18%)
HSV	hsv(192, 76%, 29%)
CMYK	cmyk(75.7%, 14.9%, 0%, 71%)
CIE-LAB	lab(24.25, -11.00, -11.15)
CIE-LCH	lch(24.25, 15.66, 225.39°)
OKLab	oklab(34.26% -0.0409 -0.0311)
OKLCH	oklch(34.26% 0.051 217.2)
XYZ	xyz(3.2625, 4.1777, 7.1117)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F4A #4A1D12

analogous

#124A39 #123F4A #12234A

triadic

#123F4A #4A123F #3F4A12

tetradic

#123F4A #39124A #4A1D12 #234A12

square

#123F4A #39124A #4A1D12 #234A12

split-complementary

#123F4A #4A1223 #4A3912

monochromatic

#061519 #061519 #123F4A #1E697B #2A93AC

Accessibility & contrast

On white

11.44

#123F4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#123F4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F4A

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F4A	#FFFFFF	#000000	##FFFFFF
##123F4A	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#383D4B

Deuteranopia (green-blind)

#30374A

Tritanopia (blue-blind)

#004342

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #123f4a;
/* rgb */ color: rgb(18, 63, 74);
/* oklch */ color: oklch(34.3% 0.051 217.2);

Tailwind

colors: {
  custom: {
    50: '#59747c',
    500: '#123f4a',
    950: '#000000',
  },
}

SCSS

$custom: #123f4a;
$custom-light: #59747c;
$custom-dark: #000000;

JSON

{
  "hex": "#123f4a",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 74
  },
  "hsl": {
    "h": 191.786,
    "s": 60.87,
    "l": 18.039
  },
  "oklch": {
    "l": 0.3426,
    "c": 0.05133,
    "h": 217.2
  },
  "luminance": 0.04178
}

Semantic roles & 50–950 ramp

primary

#123F4A

secondary

#834435

accent

#6344E4

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #123F4A

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

Preview Lab → · Contrast checker → · Palette generator →