#123E55#123E55

#123E55 is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.6% C 0.062 H 235.6°. Best body text is #FFFFFF at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#123E55
RGB	rgb(18, 62, 85)
HSL	hsl(201, 65%, 20%)
HSV	hsv(201, 79%, 33%)
CMYK	cmyk(78.8%, 27.1%, 0%, 66.7%)
CIE-LAB	lab(24.42, -6.12, -18.14)
CIE-LCH	lch(24.42, 19.14, 251.37°)
OKLab	oklab(34.56% -0.0349 -0.0511)
OKLCH	oklch(34.56% 0.062 235.6)
XYZ	xyz(3.6111, 4.2293, 9.2186)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E55 #552912

analogous

#12554A #123E55 #121C55

triadic

#123E55 #55123E #3E5512

tetradic

#123E55 #4A1255 #552912 #1C5512

square

#123E55 #4A1255 #552912 #1C5512

split-complementary

#123E55 #55121C #554A12

monochromatic

#051219 #071922 #123E55 #1D6388 #2788BA

Accessibility & contrast

On white

11.38

#123E55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#123E55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E55

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E55	#FFFFFF	#000000	##FFFFFF
##123E55	1.00	11.38	1.85	11.38
#FFFFFF	11.38	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333E56

Deuteranopia (green-blind)

#2A3755

Tritanopia (blue-blind)

#004446

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #123e55;
/* rgb */ color: rgb(18, 62, 85);
/* oklch */ color: oklch(34.6% 0.062 235.6);

Tailwind

colors: {
  custom: {
    50: '#5b7385',
    500: '#123e55',
    950: '#000000',
  },
}

SCSS

$custom: #123e55;
$custom-light: #5b7385;
$custom-dark: #000000;

JSON

{
  "hex": "#123e55",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 85
  },
  "hsl": {
    "h": 200.597,
    "s": 65.049,
    "l": 20.196
  },
  "oklch": {
    "l": 0.34563,
    "c": 0.06188,
    "h": 235.6
  },
  "luminance": 0.0423
}

Semantic roles & 50–950 ramp

primary

#123E55

secondary

#8E5335

accent

#7A40E8

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#04080B

muted

#797B7C

Preview Lab

Preview with #123E55

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

Preview Lab → · Contrast checker → · Palette generator →