#123E59#123E59

#123E59 is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 34.8% C 0.067 H 240.0°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX	#123E59
RGB	rgb(18, 62, 89)
HSL	hsl(203, 66%, 21%)
HSV	hsv(203, 80%, 35%)
CMYK	cmyk(79.8%, 30.3%, 0%, 65.1%)
CIE-LAB	lab(24.62, -4.51, -20.43)
CIE-LCH	lch(24.62, 20.93, 257.55°)
OKLab	oklab(34.8% -0.0334 -0.0577)
OKLCH	oklch(34.8% 0.067 240)
XYZ	xyz(3.7745, 4.2947, 10.0793)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E59 #592D12

analogous

#125950 #123E59 #121A59

triadic

#123E59 #59123E #3E5912

tetradic

#123E59 #501259 #592D12 #1A5912

square

#123E59 #501259 #592D12 #1A5912

split-complementary

#123E59 #59121A #595012

monochromatic

#051219 #081B26 #123E59 #1C618C #2785BF

Accessibility & contrast

On white

11.30

#123E59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#123E59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E59

11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E59	#FFFFFF	#000000	##FFFFFF
##123E59	1.00	11.30	1.86	11.30
#FFFFFF	11.30	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313E5A

Deuteranopia (green-blind)

#283759

Tritanopia (blue-blind)

#004547

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #123e59;
/* rgb */ color: rgb(18, 62, 89);
/* oklch */ color: oklch(34.8% 0.067 240.0);

Tailwind

colors: {
  custom: {
    50: '#5b7388',
    500: '#123e59',
    950: '#000000',
  },
}

SCSS

$custom: #123e59;
$custom-light: #5b7388;
$custom-dark: #000000;

JSON

{
  "hex": "#123e59",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 89
  },
  "hsl": {
    "h": 202.817,
    "s": 66.355,
    "l": 20.98
  },
  "oklch": {
    "l": 0.34795,
    "c": 0.06669,
    "h": 240
  },
  "luminance": 0.04295
}

Semantic roles & 50–950 ramp

primary

#123E59

secondary

#925835

accent

#7F3FE9

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #123E59

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

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