#123D4F#123D4F

#123D4F is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.0% C 0.056 H 229.6°. Best body text is #FFFFFF at 11.63:1 contrast (WCAG AA passes).

Color values

HEX	#123D4F
RGB	rgb(18, 61, 79)
HSL	hsl(198, 63%, 19%)
HSV	hsv(198, 77%, 31%)
CMYK	cmyk(77.2%, 22.8%, 0%, 69%)
CIE-LAB	lab(23.77, -7.84, -15.19)
CIE-LCH	lch(23.77, 17.09, 242.71°)
OKLab	oklab(33.95% -0.0362 -0.0426)
OKLCH	oklch(33.95% 0.056 229.6)
XYZ	xyz(3.3289, 4.0302, 7.9981)
Luminance	0.0403 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123D4F #4F2412

analogous

#124F43 #123D4F #121F4F

triadic

#123D4F #4F123D #3D4F12

tetradic

#123D4F #43124F #4F2412 #1F4F12

square

#123D4F #43124F #4F2412 #1F4F12

split-complementary

#123D4F #4F121F #4F4312

monochromatic

#061319 #07171D #123D4F #1D6381 #298AB3

Accessibility & contrast

On white

11.63

#123D4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#123D4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123D4F

11.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123D4F	#FFFFFF	#000000	##FFFFFF
##123D4F	1.00	11.63	1.81	11.63
#FFFFFF	11.63	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#343C50

Deuteranopia (green-blind)

#2B364F

Tritanopia (blue-blind)

#004243

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #123d4f;
/* rgb */ color: rgb(18, 61, 79);
/* oklch */ color: oklch(34.0% 0.056 229.6);

Tailwind

colors: {
  custom: {
    50: '#597280',
    500: '#123d4f',
    950: '#000000',
  },
}

SCSS

$custom: #123d4f;
$custom-light: #597280;
$custom-dark: #000000;

JSON

{
  "hex": "#123d4f",
  "rgb": {
    "r": 18,
    "g": 61,
    "b": 79
  },
  "hsl": {
    "h": 197.705,
    "s": 62.887,
    "l": 19.02
  },
  "oklch": {
    "l": 0.33952,
    "c": 0.05592,
    "h": 229.6
  },
  "luminance": 0.04031
}

Semantic roles & 50–950 ramp

primary

#123D4F

secondary

#884D35

accent

#7242E6

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #123D4F

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

Preview Lab → · Contrast checker → · Palette generator →