#123A5A#123A5A

#123A5A is a dark, moderate cyan. Relative luminance 0.039; OKLCH L 33.8% C 0.072 H 246.4°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#123A5A
RGB	rgb(18, 58, 90)
HSL	hsl(207, 67%, 21%)
HSV	hsv(207, 80%, 35%)
CMYK	cmyk(80%, 35.6%, 0%, 64.7%)
CIE-LAB	lab(23.31, -1.42, -23.15)
CIE-LCH	lch(23.31, 23.19, 266.48°)
OKLab	oklab(33.78% -0.0286 -0.0657)
OKLCH	oklch(33.78% 0.072 246.4)
XYZ	xyz(3.6073, 3.8925, 10.2321)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A5A #5A3212

analogous

#125A56 #123A5A #12165A

triadic

#123A5A #5A123A #3A5A12

tetradic

#123A5A #56125A #5A3212 #165A12

square

#123A5A #56125A #5A3212 #165A12

split-complementary

#123A5A #5A1216 #5A5612

monochromatic

#05101A #081927 #123A5A #1C5B8D #267CC0

Accessibility & contrast

On white

11.81

#123A5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#123A5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A5A

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A5A	#FFFFFF	#000000	##FFFFFF
##123A5A	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3B5B

Deuteranopia (green-blind)

#213559

Tritanopia (blue-blind)

#004245

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #123a5a;
/* rgb */ color: rgb(18, 58, 90);
/* oklch */ color: oklch(33.8% 0.072 246.4);

Tailwind

colors: {
  custom: {
    50: '#5b6f89',
    500: '#123a5a',
    950: '#000000',
  },
}

SCSS

$custom: #123a5a;
$custom-light: #5b6f89;
$custom-dark: #000000;

JSON

{
  "hex": "#123a5a",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 90
  },
  "hsl": {
    "h": 206.667,
    "s": 66.667,
    "l": 21.176
  },
  "oklch": {
    "l": 0.33778,
    "c": 0.07166,
    "h": 246.4
  },
  "luminance": 0.03893
}

Semantic roles & 50–950 ramp

primary

#123A5A

secondary

#935F35

accent

#8A3EEA

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#04070B

muted

#797A7C

Preview Lab

Preview with #123A5A

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

Preview Lab → · Contrast checker → · Palette generator →