#12173E#12173E

#12173E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.074 H 273.4°. Best body text is #FFFFFF at 17.24:1 contrast (WCAG AA passes).

Color values

HEX	#12173E
RGB	rgb(18, 23, 62)
HSL	hsl(233, 55%, 16%)
HSV	hsv(233, 71%, 24%)
CMYK	cmyk(71%, 62.9%, 0%, 75.7%)
CIE-LAB	lab(9.71, 12.46, -25.78)
CIE-LCH	lch(9.71, 28.64, 295.80°)
OKLab	oklab(22.65% 0.0045 -0.074)
OKLCH	oklch(22.65% 0.074 273.4)
XYZ	xyz(1.4251, 1.0891, 4.6916)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12173E #3E3912

analogous

#122D3E #12173E #23123E

triadic

#12173E #3E1217 #173E12

tetradic

#12173E #3E122D #3E3912 #123E23

square

#12173E #3E122D #3E3912 #123E23

split-complementary

#12173E #3E2312 #2D3E12

monochromatic

#070918 #070918 #12173E #20296D #2E3A9D

Accessibility & contrast

On white

17.24

#12173E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#12173E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12173E

17.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12173E	#FFFFFF	#000000	##FFFFFF
##12173E	1.00	17.24	1.22	17.24
#FFFFFF	17.24	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D3F

Deuteranopia (green-blind)

#00193D

Tritanopia (blue-blind)

#002027

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #12173e;
/* rgb */ color: rgb(18, 23, 62);
/* oklch */ color: oklch(22.7% 0.074 273.4);

Tailwind

colors: {
  custom: {
    50: '#565374',
    500: '#12173e',
    950: '#000000',
  },
}

SCSS

$custom: #12173e;
$custom-light: #565374;
$custom-dark: #000000;

JSON

{
  "hex": "#12173e",
  "rgb": {
    "r": 18,
    "g": 23,
    "b": 62
  },
  "hsl": {
    "h": 233.182,
    "s": 55,
    "l": 15.686
  },
  "oklch": {
    "l": 0.2265,
    "c": 0.07416,
    "h": 273.4
  },
  "luminance": 0.01089
}

Semantic roles & 50–950 ramp

primary

#12173E

secondary

#776F35

accent

#CD49DE

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #12173E

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

Preview Lab → · Contrast checker → · Palette generator →