#123F6A#123F6A

#123F6A is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 36.1% C 0.089 H 251.0°. Best body text is #FFFFFF at 10.80:1 contrast (WCAG AA passes).

Color values

HEX	#123F6A
RGB	rgb(18, 63, 106)
HSL	hsl(209, 71%, 24%)
HSV	hsv(209, 83%, 42%)
CMYK	cmyk(83%, 40.6%, 0%, 58.4%)
CIE-LAB	lab(25.93, 1.83, -29.37)
CIE-LCH	lch(25.93, 29.42, 273.57°)
OKLab	oklab(36.15% -0.0289 -0.0838)
OKLCH	oklch(36.15% 0.089 251)
XYZ	xyz(4.6275, 4.7237, 14.3007)
Luminance	0.0472 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F6A #6A3D12

analogous

#126A69 #123F6A #12136A

triadic

#123F6A #6A123F #3F6A12

tetradic

#123F6A #69126A #6A3D12 #136A12

square

#123F6A #69126A #6A3D12 #136A12

split-complementary

#123F6A #6A1213 #6A6912

monochromatic

#04101A #092036 #123F6A #1B5E9E #247DD3

Accessibility & contrast

On white

10.80

#123F6A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#123F6A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F6A

10.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F6A	#FFFFFF	#000000	##FFFFFF
##123F6A	1.00	10.80	1.94	10.80
#FFFFFF	10.80	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B426C

Deuteranopia (green-blind)

#1D3A69

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #123f6a;
/* rgb */ color: rgb(18, 63, 106);
/* oklch */ color: oklch(36.1% 0.089 251.0);

Tailwind

colors: {
  custom: {
    50: '#5f7395',
    500: '#123f6a',
    950: '#000000',
  },
}

SCSS

$custom: #123f6a;
$custom-light: #5f7395;
$custom-dark: #000000;

JSON

{
  "hex": "#123f6a",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 106
  },
  "hsl": {
    "h": 209.318,
    "s": 70.968,
    "l": 24.314
  },
  "oklch": {
    "l": 0.36146,
    "c": 0.08864,
    "h": 251
  },
  "luminance": 0.04724
}

Semantic roles & 50–950 ramp

primary

#123F6A

secondary

#A26B36

accent

#923AEE

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#05080D

muted

#7A7B7E

Preview Lab

Preview with #123F6A

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

Preview Lab → · Contrast checker → · Palette generator →