#123F5C#123F5C

#123F5C is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.2% C 0.070 H 241.4°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#123F5C
RGB	rgb(18, 63, 92)
HSL	hsl(204, 67%, 22%)
HSV	hsv(204, 80%, 36%)
CMYK	cmyk(80.4%, 31.5%, 0%, 63.9%)
CIE-LAB	lab(25.12, -3.95, -21.60)
CIE-LCH	lch(25.12, 21.96, 259.63°)
OKLab	oklab(35.25% -0.0334 -0.0611)
OKLCH	oklch(35.25% 0.07 241.4)
XYZ	xyz(3.9580, 4.4559, 10.7746)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F5C #5C2F12

analogous

#125C54 #123F5C #121A5C

triadic

#123F5C #5C123F #3F5C12

tetradic

#123F5C #54125C #5C2F12 #1A5C12

square

#123F5C #54125C #5C2F12 #1A5C12

split-complementary

#123F5C #5C121A #5C5412

monochromatic

#05121A #081C29 #123F5C #1C628F #2685C2

Accessibility & contrast

On white

11.10

#123F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#123F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F5C

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F5C	#FFFFFF	#000000	##FFFFFF
##123F5C	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323F5D

Deuteranopia (green-blind)

#27385B

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #123f5c;
/* rgb */ color: rgb(18, 63, 92);
/* oklch */ color: oklch(35.2% 0.070 241.4);

Tailwind

colors: {
  custom: {
    50: '#5c738a',
    500: '#123f5c',
    950: '#000000',
  },
}

SCSS

$custom: #123f5c;
$custom-light: #5c738a;
$custom-dark: #000000;

JSON

{
  "hex": "#123f5c",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 92
  },
  "hsl": {
    "h": 203.514,
    "s": 67.273,
    "l": 21.569
  },
  "oklch": {
    "l": 0.35246,
    "c": 0.06964,
    "h": 241.4
  },
  "luminance": 0.04456
}

Semantic roles & 50–950 ramp

primary

#123F5C

secondary

#945B35

accent

#813EEA

background

#F5F7F8

surface

#E9EDF0

border

#C5C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #123F5C

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

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