#123E5D#123E5D

#123E5D is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.0% C 0.072 H 243.6°. Best body text is #FFFFFF at 11.21:1 contrast (WCAG AA passes).

Color values

HEX	#123E5D
RGB	rgb(18, 62, 93)
HSL	hsl(205, 68%, 22%)
HSV	hsv(205, 81%, 36%)
CMYK	cmyk(80.6%, 33.3%, 0%, 63.5%)
CIE-LAB	lab(24.84, -2.88, -22.70)
CIE-LCH	lch(24.84, 22.88, 262.76°)
OKLab	oklab(35.04% -0.0319 -0.0643)
OKLCH	oklch(35.04% 0.072 243.6)
XYZ	xyz(3.9471, 4.3637, 10.9881)
Luminance	0.0436 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123E5D #5D3112

analogous

#125D57 #123E5D #12195D

triadic

#123E5D #5D123E #3E5D12

tetradic

#123E5D #57125D #5D3112 #195D12

square

#123E5D #57125D #5D3112 #195D12

split-complementary

#123E5D #5D1219 #5D5712

monochromatic

#05111A #081C2A #123E5D #1C6090 #2682C4

Accessibility & contrast

On white

11.21

#123E5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#123E5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123E5D

11.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123E5D	#FFFFFF	#000000	##FFFFFF
##123E5D	1.00	11.21	1.87	11.21
#FFFFFF	11.21	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#303F5E

Deuteranopia (green-blind)

#25385C

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #123e5d;
/* rgb */ color: rgb(18, 62, 93);
/* oklch */ color: oklch(35.0% 0.072 243.6);

Tailwind

colors: {
  custom: {
    50: '#5c738b',
    500: '#123e5d',
    950: '#000000',
  },
}

SCSS

$custom: #123e5d;
$custom-light: #5c738b;
$custom-dark: #000000;

JSON

{
  "hex": "#123e5d",
  "rgb": {
    "r": 18,
    "g": 62,
    "b": 93
  },
  "hsl": {
    "h": 204.8,
    "s": 67.568,
    "l": 21.765
  },
  "oklch": {
    "l": 0.35038,
    "c": 0.07182,
    "h": 243.6
  },
  "luminance": 0.04364
}

Semantic roles & 50–950 ramp

primary

#123E5D

secondary

#955D35

accent

#853DEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #123E5D

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

Preview Lab → · Contrast checker → · Palette generator →