#123A5C#123A5C

#123A5C is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.9% C 0.074 H 247.9°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#123A5C
RGB	rgb(18, 58, 92)
HSL	hsl(208, 67%, 22%)
HSV	hsv(208, 80%, 36%)
CMYK	cmyk(80.4%, 37%, 0%, 63.9%)
CIE-LAB	lab(23.43, -0.59, -24.27)
CIE-LCH	lch(23.43, 24.28, 268.60°)
OKLab	oklab(33.91% -0.028 -0.069)
OKLCH	oklch(33.91% 0.074 247.9)
XYZ	xyz(3.6935, 3.9270, 10.6865)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A5C #5C3412

analogous

#125C59 #123A5C #12155C

triadic

#123A5C #5C123A #3A5C12

tetradic

#123A5C #59125C #5C3412 #155C12

square

#123A5C #59125C #5C3412 #155C12

split-complementary

#123A5C #5C1215 #5C5912

monochromatic

#05101A #081A29 #123A5C #1C5A8F #267BC2

Accessibility & contrast

On white

11.76

#123A5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#123A5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A5C

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A5C	#FFFFFF	#000000	##FFFFFF
##123A5C	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3C5D

Deuteranopia (green-blind)

#20355B

Tritanopia (blue-blind)

#004246

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #123a5c;
/* rgb */ color: rgb(18, 58, 92);
/* oklch */ color: oklch(33.9% 0.074 247.9);

Tailwind

colors: {
  custom: {
    50: '#5c6f8a',
    500: '#123a5c',
    950: '#000000',
  },
}

SCSS

$custom: #123a5c;
$custom-light: #5c6f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#123a5c",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 92
  },
  "hsl": {
    "h": 207.568,
    "s": 67.273,
    "l": 21.569
  },
  "oklch": {
    "l": 0.33907,
    "c": 0.07444,
    "h": 247.9
  },
  "luminance": 0.03927
}

Semantic roles & 50–950 ramp

primary

#123A5C

secondary

#946135

accent

#8D3EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070C

muted

#797A7D

Preview Lab

Preview with #123A5C

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

Preview Lab → · Contrast checker → · Palette generator →