#123F4F#123F4F

#123F4F is a dark, muted cyan. Relative luminance 0.042; OKLCH L 34.5% C 0.055 H 225.6°. Best body text is #FFFFFF at 11.35:1 contrast (WCAG AA passes).

Color values

HEX	#123F4F
RGB	rgb(18, 63, 79)
HSL	hsl(196, 63%, 19%)
HSV	hsv(196, 77%, 31%)
CMYK	cmyk(77.2%, 20.3%, 0%, 69%)
CIE-LAB	lab(24.47, -9.10, -14.10)
CIE-LCH	lch(24.47, 16.79, 237.16°)
OKLab	oklab(34.51% -0.0386 -0.0395)
OKLCH	oklch(34.51% 0.055 225.6)
XYZ	xyz(3.4377, 4.2477, 8.0343)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F4F #4F2212

analogous

#124F41 #123F4F #12214F

triadic

#123F4F #4F123F #3F4F12

tetradic

#123F4F #41124F #4F2212 #214F12

square

#123F4F #41124F #4F2212 #214F12

split-complementary

#123F4F #4F1221 #4F4112

monochromatic

#061419 #07171D #123F4F #1D6781 #298EB3

Accessibility & contrast

On white

11.35

#123F4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#123F4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F4F

11.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F4F	#FFFFFF	#000000	##FFFFFF
##123F4F	1.00	11.35	1.85	11.35
#FFFFFF	11.35	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363E50

Deuteranopia (green-blind)

#2E374F

Tritanopia (blue-blind)

#004444

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #123f4f;
/* rgb */ color: rgb(18, 63, 79);
/* oklch */ color: oklch(34.5% 0.055 225.6);

Tailwind

colors: {
  custom: {
    50: '#5a7480',
    500: '#123f4f',
    950: '#000000',
  },
}

SCSS

$custom: #123f4f;
$custom-light: #5a7480;
$custom-dark: #000000;

JSON

{
  "hex": "#123f4f",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 79
  },
  "hsl": {
    "h": 195.738,
    "s": 62.887,
    "l": 19.02
  },
  "oklch": {
    "l": 0.34514,
    "c": 0.05521,
    "h": 225.6
  },
  "luminance": 0.04248
}

Semantic roles & 50–950 ramp

primary

#123F4F

secondary

#884B35

accent

#6D42E6

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #123F4F

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

Preview Lab → · Contrast checker → · Palette generator →