#123D5A#123D5A

#123D5A is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.6% C 0.069 H 242.4°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#123D5A
RGB	rgb(18, 61, 90)
HSL	hsl(204, 67%, 21%)
HSV	hsv(204, 80%, 35%)
CMYK	cmyk(80%, 32.2%, 0%, 64.7%)
CIE-LAB	lab(24.33, -3.44, -21.54)
CIE-LCH	lch(24.33, 21.81, 260.92°)
OKLab	oklab(34.59% -0.0319 -0.061)
OKLCH	oklch(34.59% 0.069 242.4)
XYZ	xyz(3.7629, 4.2038, 10.2840)
Luminance	0.0420 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123D5A #5A2F12

analogous

#125A53 #123D5A #12195A

triadic

#123D5A #5A123D #3D5A12

tetradic

#123D5A #53125A #5A2F12 #195A12

square

#123D5A #53125A #5A2F12 #195A12

split-complementary

#123D5A #5A1219 #5A5312

monochromatic

#05111A #081A27 #123D5A #1C608D #2682C0

Accessibility & contrast

On white

11.41

#123D5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#123D5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123D5A

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123D5A	#FFFFFF	#000000	##FFFFFF
##123D5A	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303E5B

Deuteranopia (green-blind)

#263759

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #123d5a;
/* rgb */ color: rgb(18, 61, 90);
/* oklch */ color: oklch(34.6% 0.069 242.4);

Tailwind

colors: {
  custom: {
    50: '#5c7289',
    500: '#123d5a',
    950: '#000000',
  },
}

SCSS

$custom: #123d5a;
$custom-light: #5c7289;
$custom-dark: #000000;

JSON

{
  "hex": "#123d5a",
  "rgb": {
    "r": 18,
    "g": 61,
    "b": 90
  },
  "hsl": {
    "h": 204.167,
    "s": 66.667,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34585,
    "c": 0.06881,
    "h": 242.4
  },
  "luminance": 0.04204
}

Semantic roles & 50–950 ramp

primary

#123D5A

secondary

#935B35

accent

#833EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #123D5A

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

Preview Lab → · Contrast checker → · Palette generator →