#123A5B#123A5B

#123A5B is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.073 H 247.2°. Best body text is #FFFFFF at 11.78:1 contrast (WCAG AA passes).

Color values

HEX	#123A5B
RGB	rgb(18, 58, 91)
HSL	hsl(207, 67%, 21%)
HSV	hsv(207, 80%, 36%)
CMYK	cmyk(80.2%, 36.3%, 0%, 64.3%)
CIE-LAB	lab(23.37, -1.01, -23.71)
CIE-LCH	lch(23.37, 23.73, 267.56°)
OKLab	oklab(33.84% -0.0283 -0.0673)
OKLCH	oklch(33.84% 0.073 247.2)
XYZ	xyz(3.6501, 3.9096, 10.4578)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A5B #5B3312

analogous

#125B58 #123A5B #12165B

triadic

#123A5B #5B123A #3A5B12

tetradic

#123A5B #58125B #5B3312 #165B12

square

#123A5B #58125B #5B3312 #165B12

split-complementary

#123A5B #5B1216 #5B5812

monochromatic

#05101A #081928 #123A5B #1C5B8E #267BC1

Accessibility & contrast

On white

11.78

#123A5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#123A5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A5B

11.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A5B	#FFFFFF	#000000	##FFFFFF
##123A5B	1.00	11.78	1.78	11.78
#FFFFFF	11.78	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3B5C

Deuteranopia (green-blind)

#20355A

Tritanopia (blue-blind)

#004246

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #123a5b;
/* rgb */ color: rgb(18, 58, 91);
/* oklch */ color: oklch(33.8% 0.073 247.2);

Tailwind

colors: {
  custom: {
    50: '#5c6f89',
    500: '#123a5b',
    950: '#000000',
  },
}

SCSS

$custom: #123a5b;
$custom-light: #5c6f89;
$custom-dark: #000000;

JSON

{
  "hex": "#123a5b",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 91
  },
  "hsl": {
    "h": 207.123,
    "s": 66.972,
    "l": 21.373
  },
  "oklch": {
    "l": 0.33842,
    "c": 0.07305,
    "h": 247.2
  },
  "luminance": 0.0391
}

Semantic roles & 50–950 ramp

primary

#123A5B

secondary

#936035

accent

#8C3EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #123A5B

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

Preview Lab → · Contrast checker → · Palette generator →