#123C5A#123C5A

#123C5A is a dark, moderate cyan. Relative luminance 0.041; OKLCH L 34.3% C 0.070 H 243.8°. Best body text is #FFFFFF at 11.54:1 contrast (WCAG AA passes).

Color values

HEX	#123C5A
RGB	rgb(18, 60, 90)
HSL	hsl(205, 67%, 21%)
HSV	hsv(205, 80%, 35%)
CMYK	cmyk(80%, 33.3%, 0%, 64.7%)
CIE-LAB	lab(23.99, -2.77, -22.08)
CIE-LCH	lch(23.99, 22.25, 262.84°)
OKLab	oklab(34.32% -0.0308 -0.0625)
OKLCH	oklch(34.32% 0.07 243.8)
XYZ	xyz(3.7101, 4.0981, 10.2664)
Luminance	0.0410 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123C5A #5A3012

analogous

#125A54 #123C5A #12185A

triadic

#123C5A #5A123C #3C5A12

tetradic

#123C5A #54125A #5A3012 #185A12

square

#123C5A #54125A #5A3012 #185A12

split-complementary

#123C5A #5A1218 #5A5412

monochromatic

#05111A #081A27 #123C5A #1C5E8D #2680C0

Accessibility & contrast

On white

11.54

#123C5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#123C5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123C5A

11.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123C5A	#FFFFFF	#000000	##FFFFFF
##123C5A	1.00	11.54	1.82	11.54
#FFFFFF	11.54	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3D5B

Deuteranopia (green-blind)

#243659

Tritanopia (blue-blind)

#004347

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #123c5a;
/* rgb */ color: rgb(18, 60, 90);
/* oklch */ color: oklch(34.3% 0.070 243.8);

Tailwind

colors: {
  custom: {
    50: '#5b7189',
    500: '#123c5a',
    950: '#000000',
  },
}

SCSS

$custom: #123c5a;
$custom-light: #5b7189;
$custom-dark: #000000;

JSON

{
  "hex": "#123c5a",
  "rgb": {
    "r": 18,
    "g": 60,
    "b": 90
  },
  "hsl": {
    "h": 205,
    "s": 66.667,
    "l": 21.176
  },
  "oklch": {
    "l": 0.34315,
    "c": 0.06972,
    "h": 243.8
  },
  "luminance": 0.04099
}

Semantic roles & 50–950 ramp

primary

#123C5A

secondary

#935C35

accent

#863EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #123C5A

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

Preview Lab → · Contrast checker → · Palette generator →