#123F5D#123F5D

#123F5D is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.3% C 0.071 H 242.2°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#123F5D
RGB	rgb(18, 63, 93)
HSL	hsl(204, 68%, 22%)
HSV	hsv(204, 81%, 36%)
CMYK	cmyk(80.6%, 32.3%, 0%, 63.5%)
CIE-LAB	lab(25.18, -3.55, -22.17)
CIE-LCH	lch(25.18, 22.45, 260.91°)
OKLab	oklab(35.31% -0.033 -0.0628)
OKLCH	oklch(35.31% 0.071 242.2)
XYZ	xyz(4.0020, 4.4735, 11.0063)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F5D #5D3012

analogous

#125D56 #123F5D #121A5D

triadic

#123F5D #5D123F #3F5D12

tetradic

#123F5D #56125D #5D3012 #1A5D12

square

#123F5D #56125D #5D3012 #1A5D12

split-complementary

#123F5D #5D121A #5D5612

monochromatic

#05111A #081C2A #123F5D #1C6290 #2684C4

Accessibility & contrast

On white

11.08

#123F5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#123F5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F5D

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F5D	#FFFFFF	#000000	##FFFFFF
##123F5D	1.00	11.08	1.89	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31405E

Deuteranopia (green-blind)

#27395C

Tritanopia (blue-blind)

#00464A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #123f5d;
/* rgb */ color: rgb(18, 63, 93);
/* oklch */ color: oklch(35.3% 0.071 242.2);

Tailwind

colors: {
  custom: {
    50: '#5c738b',
    500: '#123f5d',
    950: '#000000',
  },
}

SCSS

$custom: #123f5d;
$custom-light: #5c738b;
$custom-dark: #000000;

JSON

{
  "hex": "#123f5d",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 93
  },
  "hsl": {
    "h": 204,
    "s": 67.568,
    "l": 21.765
  },
  "oklch": {
    "l": 0.35306,
    "c": 0.07092,
    "h": 242.2
  },
  "luminance": 0.04474
}

Semantic roles & 50–950 ramp

primary

#123F5D

secondary

#955C35

accent

#833DEA

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #123F5D

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

Preview Lab → · Contrast checker → · Palette generator →