#121C3B#121C3B

#121C3B is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.6% C 0.061 H 268.1°. Best body text is #FFFFFF at 16.73:1 contrast (WCAG AA passes).

Color values

HEX	#121C3B
RGB	rgb(18, 28, 59)
HSL	hsl(225, 53%, 15%)
HSV	hsv(225, 69%, 23%)
CMYK	cmyk(69.5%, 52.5%, 0%, 76.9%)
CIE-LAB	lab(11.10, 7.32, -21.42)
CIE-LCH	lch(11.10, 22.64, 288.86°)
OKLab	oklab(23.62% -0.0021 -0.0611)
OKLCH	oklch(23.62% 0.061 268.1)
XYZ	xyz(1.4539, 1.2748, 4.3063)
Luminance	0.0127 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121C3B #3B3112

analogous

#12303B #121C3B #1C123B

triadic

#121C3B #3B121C #1C3B12

tetradic

#121C3B #3B1230 #3B3112 #123B1C

square

#121C3B #3B1230 #3B3112 #123B1C

split-complementary

#121C3B #3B1C12 #303B12

monochromatic

#070B17 #070B17 #121C3B #20326A #2F4999

Accessibility & contrast

On white

16.73

#121C3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#121C3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121C3B

16.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121C3B	#FFFFFF	#000000	##FFFFFF
##121C3B	1.00	16.73	1.25	16.73
#FFFFFF	16.73	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D203C

Deuteranopia (green-blind)

#071C3A

Tritanopia (blue-blind)

#002328

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #121c3b;
/* rgb */ color: rgb(18, 28, 59);
/* oklch */ color: oklch(23.6% 0.061 268.1);

Tailwind

colors: {
  custom: {
    50: '#545771',
    500: '#121c3b',
    950: '#000000',
  },
}

SCSS

$custom: #121c3b;
$custom-light: #545771;
$custom-dark: #000000;

JSON

{
  "hex": "#121c3b",
  "rgb": {
    "r": 18,
    "g": 28,
    "b": 59
  },
  "hsl": {
    "h": 225.366,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.23622,
    "c": 0.06116,
    "h": 268.1
  },
  "luminance": 0.01275
}

Semantic roles & 50–950 ramp

primary

#121C3B

secondary

#746535

accent

#B94BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #121C3B

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

Preview Lab → · Contrast checker → · Palette generator →