#123E5C#123E5C

#123E5C is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.0% C 0.071 H 242.7°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#123E5C
RGB	rgb(18, 62, 92)
HSL	hsl(204, 67%, 22%)
HSV	hsv(204, 80%, 36%)
CMYK	cmyk(80.4%, 32.6%, 0%, 63.9%)
CIE-LAB	lab(24.78, -3.29, -22.14)
CIE-LCH	lch(24.78, 22.38, 261.54°)
OKLab	oklab(34.98% -0.0323 -0.0627)
OKLCH	oklch(34.98% 0.071 242.7)
XYZ	xyz(3.9031, 4.3461, 10.7563)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E5C #5C3012

analogous

#125C55 #123E5C #12195C

triadic

#123E5C #5C123E #3E5C12

tetradic

#123E5C #55125C #5C3012 #195C12

square

#123E5C #55125C #5C3012 #195C12

split-complementary

#123E5C #5C1219 #5C5512

monochromatic

#05111A #081C29 #123E5C #1C608F #2683C2

Accessibility & contrast

On white

11.23

#123E5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#123E5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E5C

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E5C	#FFFFFF	#000000	##FFFFFF
##123E5C	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303F5D

Deuteranopia (green-blind)

#26385B

Tritanopia (blue-blind)

#004549

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #123e5c;
/* rgb */ color: rgb(18, 62, 92);
/* oklch */ color: oklch(35.0% 0.071 242.7);

Tailwind

colors: {
  custom: {
    50: '#5c738a',
    500: '#123e5c',
    950: '#000000',
  },
}

SCSS

$custom: #123e5c;
$custom-light: #5c738a;
$custom-dark: #000000;

JSON

{
  "hex": "#123e5c",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 92
  },
  "hsl": {
    "h": 204.324,
    "s": 67.273,
    "l": 21.569
  },
  "oklch": {
    "l": 0.34976,
    "c": 0.07052,
    "h": 242.7
  },
  "luminance": 0.04347
}

Semantic roles & 50–950 ramp

primary

#123E5C

secondary

#945C35

accent

#843EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #123E5C

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

Preview Lab → · Contrast checker → · Palette generator →