#12173F#12173F

#12173F is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.076 H 273.4°. Best body text is #FFFFFF at 17.21:1 contrast (WCAG AA passes).

Color values

HEX	#12173F
RGB	rgb(18, 23, 63)
HSL	hsl(233, 56%, 16%)
HSV	hsv(233, 71%, 25%)
CMYK	cmyk(71.4%, 63.5%, 0%, 75.3%)
CIE-LAB	lab(9.80, 12.88, -26.35)
CIE-LCH	lch(9.80, 29.33, 296.05°)
OKLab	oklab(22.74% 0.0045 -0.0757)
OKLCH	oklch(22.74% 0.076 273.4)
XYZ	xyz(1.4528, 1.1002, 4.8375)
Luminance	0.0110 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12173F #3F3A12

analogous

#122D3F #12173F #23123F

triadic

#12173F #3F1217 #173F12

tetradic

#12173F #3F122D #3F3A12 #123F23

square

#12173F #3F122D #3F3A12 #123F23

split-complementary

#12173F #3F2312 #2D3F12

monochromatic

#070918 #070918 #12173F #20286F #2D3A9E

Accessibility & contrast

On white

17.21

#12173F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#12173F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12173F

17.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12173F	#FFFFFF	#000000	##FFFFFF
##12173F	1.00	17.21	1.22	17.21
#FFFFFF	17.21	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D40

Deuteranopia (green-blind)

#00193E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #12173f;
/* rgb */ color: rgb(18, 23, 63);
/* oklch */ color: oklch(22.7% 0.076 273.4);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#12173f",
  "rgb": {
    "r": 18,
    "g": 23,
    "b": 63
  },
  "hsl": {
    "h": 233.333,
    "s": 55.556,
    "l": 15.882
  },
  "oklch": {
    "l": 0.22743,
    "c": 0.07583,
    "h": 273.4
  },
  "luminance": 0.011
}

Semantic roles & 50–950 ramp

primary

#12173F

secondary

#787135

accent

#CE49DF

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #12173F

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

Preview Lab → · Contrast checker → · Palette generator →