#121B3B#121B3B

#121B3B is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.4% C 0.063 H 269.3°. Best body text is #FFFFFF at 16.86:1 contrast (WCAG AA passes).

Color values

HEX	#121B3B
RGB	rgb(18, 27, 59)
HSL	hsl(227, 53%, 15%)
HSV	hsv(227, 69%, 23%)
CMYK	cmyk(69.5%, 54.2%, 0%, 76.9%)
CIE-LAB	lab(10.76, 8.09, -21.96)
CIE-LCH	lch(10.76, 23.40, 290.23°)
OKLab	oklab(23.37% -0.0008 -0.0627)
OKLCH	oklch(23.37% 0.063 269.3)
XYZ	xyz(1.4305, 1.2281, 4.2985)
Luminance	0.0123 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B3B #3B3212

analogous

#12303B #121B3B #1D123B

triadic

#121B3B #3B121B #1B3B12

tetradic

#121B3B #3B1230 #3B3212 #123B1D

square

#121B3B #3B1230 #3B3212 #123B1D

split-complementary

#121B3B #3B1D12 #303B12

monochromatic

#070B17 #070B17 #121B3B #20306A #2F4699

Accessibility & contrast

On white

16.86

#121B3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#121B3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B3B

16.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B3B	#FFFFFF	#000000	##FFFFFF
##121B3B	1.00	16.86	1.25	16.86
#FFFFFF	16.86	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B1F3C

Deuteranopia (green-blind)

#061B3A

Tritanopia (blue-blind)

#002228

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #121b3b;
/* rgb */ color: rgb(18, 27, 59);
/* oklch */ color: oklch(23.4% 0.063 269.3);

Tailwind

colors: {
  custom: {
    50: '#555671',
    500: '#121b3b',
    950: '#000000',
  },
}

SCSS

$custom: #121b3b;
$custom-light: #555671;
$custom-dark: #000000;

JSON

{
  "hex": "#121b3b",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 59
  },
  "hsl": {
    "h": 226.829,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.23367,
    "c": 0.06271,
    "h": 269.3
  },
  "luminance": 0.01228
}

Semantic roles & 50–950 ramp

primary

#121B3B

secondary

#746635

accent

#BD4BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #121B3B

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

Preview Lab → · Contrast checker → · Palette generator →