#123C5B#123C5B

#123C5B is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.4% C 0.071 H 244.6°. Best body text is #FFFFFF at 11.52:1 contrast (WCAG AA passes).

Color values

HEX	#123C5B
RGB	rgb(18, 60, 91)
HSL	hsl(205, 67%, 21%)
HSV	hsv(205, 80%, 36%)
CMYK	cmyk(80.2%, 34.1%, 0%, 64.3%)
CIE-LAB	lab(24.05, -2.36, -22.64)
CIE-LCH	lch(24.05, 22.77, 264.04°)
OKLab	oklab(34.38% -0.0305 -0.0642)
OKLCH	oklch(34.38% 0.071 244.6)
XYZ	xyz(3.7529, 4.1152, 10.4920)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123C5B #5B3112

analogous

#125B56 #123C5B #12185B

triadic

#123C5B #5B123C #3C5B12

tetradic

#123C5B #56125B #5B3112 #185B12

square

#123C5B #56125B #5B3112 #185B12

split-complementary

#123C5B #5B1218 #5B5612

monochromatic

#05111A #081A28 #123C5B #1C5E8E #267FC1

Accessibility & contrast

On white

11.52

#123C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#123C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123C5B

11.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123C5B	#FFFFFF	#000000	##FFFFFF
##123C5B	1.00	11.52	1.82	11.52
#FFFFFF	11.52	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3D5C

Deuteranopia (green-blind)

#24365A

Tritanopia (blue-blind)

#004447

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #123c5b;
/* rgb */ color: rgb(18, 60, 91);
/* oklch */ color: oklch(34.4% 0.071 244.6);

Tailwind

colors: {
  custom: {
    50: '#5c7189',
    500: '#123c5b',
    950: '#000000',
  },
}

SCSS

$custom: #123c5b;
$custom-light: #5c7189;
$custom-dark: #000000;

JSON

{
  "hex": "#123c5b",
  "rgb": {
    "r": 18,
    "g": 60,
    "b": 91
  },
  "hsl": {
    "h": 205.479,
    "s": 66.972,
    "l": 21.373
  },
  "oklch": {
    "l": 0.34377,
    "c": 0.07105,
    "h": 244.6
  },
  "luminance": 0.04116
}

Semantic roles & 50–950 ramp

primary

#123C5B

secondary

#935D35

accent

#873EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #123C5B

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

Preview Lab → · Contrast checker → · Palette generator →