#12123B#12123B

#12123B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.2% C 0.077 H 277.6°. Best body text is #FFFFFF at 17.87:1 contrast (WCAG AA passes).

Color values

HEX	#12123B
RGB	rgb(18, 18, 59)
HSL	hsl(240, 53%, 15%)
HSV	hsv(240, 69%, 23%)
CMYK	cmyk(69.5%, 69.5%, 0%, 76.9%)
CIE-LAB	lab(7.92, 15.07, -26.55)
CIE-LCH	lch(7.92, 30.52, 299.58°)
OKLab	oklab(21.23% 0.0102 -0.0763)
OKLCH	oklch(21.23% 0.077 277.6)
XYZ	xyz(1.2549, 0.8769, 4.2399)
Luminance	0.0088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12123B #3B3B12

analogous

#12263B #12123B #26123B

triadic

#12123B #3B1212 #123B12

tetradic

#12123B #3B1226 #3B3B12 #123B26

square

#12123B #3B1226 #3B3B12 #123B26

split-complementary

#12123B #3B2612 #263B12

monochromatic

#070717 #070717 #12123B #20206A #2F2F99

Accessibility & contrast

On white

17.87

#12123B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#12123B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12123B

17.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12123B	#FFFFFF	#000000	##FFFFFF
##12123B	1.00	17.87	1.18	17.87
#FFFFFF	17.87	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00193C

Deuteranopia (green-blind)

#00163A

Tritanopia (blue-blind)

#001C24

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #12123b;
/* rgb */ color: rgb(18, 18, 59);
/* oklch */ color: oklch(21.2% 0.077 277.6);

Tailwind

colors: {
  custom: {
    50: '#554f71',
    500: '#12123b',
    950: '#000000',
  },
}

SCSS

$custom: #12123b;
$custom-light: #554f71;
$custom-dark: #000000;

JSON

{
  "hex": "#12123b",
  "rgb": {
    "r": 18,
    "g": 18,
    "b": 59
  },
  "hsl": {
    "h": 240,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.21233,
    "c": 0.07701,
    "h": 277.6
  },
  "luminance": 0.00877
}

Semantic roles & 50–950 ramp

primary

#12123B

secondary

#747435

accent

#DD4BDD

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030208

muted

#78787B

Preview Lab

Preview with #12123B

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

Preview Lab → · Contrast checker → · Palette generator →