#12173B#12173B

#12173B is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.4% C 0.069 H 273.5°. Best body text is #FFFFFF at 17.34:1 contrast (WCAG AA passes).

Color values

HEX	#12173B
RGB	rgb(18, 23, 59)
HSL	hsl(233, 53%, 15%)
HSV	hsv(233, 69%, 23%)
CMYK	cmyk(69.5%, 61%, 0%, 76.9%)
CIE-LAB	lab(9.46, 11.20, -24.06)
CIE-LCH	lch(9.46, 26.54, 294.97°)
OKLab	oklab(22.38% 0.0043 -0.0689)
OKLCH	oklch(22.38% 0.069 273.5)
XYZ	xyz(1.3450, 1.0571, 4.2700)
Luminance	0.0106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12173B #3B3612

analogous

#122B3B #12173B #21123B

triadic

#12173B #3B1217 #173B12

tetradic

#12173B #3B122B #3B3612 #123B21

square

#12173B #3B122B #3B3612 #123B21

split-complementary

#12173B #3B2112 #2B3B12

monochromatic

#070917 #070917 #12173B #20296A #2F3C99

Accessibility & contrast

On white

17.34

#12173B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#12173B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12173B

17.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12173B	#FFFFFF	#000000	##FFFFFF
##12173B	1.00	17.34	1.21	17.34
#FFFFFF	17.34	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031C3C

Deuteranopia (green-blind)

#00193A

Tritanopia (blue-blind)

#001F26

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #12173b;
/* rgb */ color: rgb(18, 23, 59);
/* oklch */ color: oklch(22.4% 0.069 273.5);

Tailwind

colors: {
  custom: {
    50: '#555371',
    500: '#12173b',
    950: '#000000',
  },
}

SCSS

$custom: #12173b;
$custom-light: #555371;
$custom-dark: #000000;

JSON

{
  "hex": "#12173b",
  "rgb": {
    "r": 18,
    "g": 23,
    "b": 59
  },
  "hsl": {
    "h": 232.683,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.22378,
    "c": 0.06907,
    "h": 273.5
  },
  "luminance": 0.01057
}

Semantic roles & 50–950 ramp

primary

#12173B

secondary

#746C35

accent

#CB4BDD

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #12173B

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

Preview Lab → · Contrast checker → · Palette generator →