#121B3C#121B3C

#121B3C is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.4% C 0.064 H 269.4°. Best body text is #FFFFFF at 16.83:1 contrast (WCAG AA passes).

Color values

HEX	#121B3C
RGB	rgb(18, 27, 60)
HSL	hsl(227, 54%, 15%)
HSV	hsv(227, 70%, 24%)
CMYK	cmyk(70%, 55%, 0%, 76.5%)
CIE-LAB	lab(10.84, 8.51, -22.55)
CIE-LCH	lch(10.84, 24.10, 290.68°)
OKLab	oklab(23.45% -0.0006 -0.0644)
OKLCH	oklch(23.45% 0.064 269.4)
XYZ	xyz(1.4567, 1.2386, 4.4364)
Luminance	0.0124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B3C #3C3312

analogous

#12303C #121B3C #1E123C

triadic

#121B3C #3C121B #1B3C12

tetradic

#121B3C #3C1230 #3C3312 #123C1E

square

#121B3C #3C1230 #3C3312 #123C1E

split-complementary

#121B3C #3C1E12 #303C12

monochromatic

#070B18 #070B18 #121B3C #20306B #2E459A

Accessibility & contrast

On white

16.83

#121B3C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#121B3C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B3C

16.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B3C	#FFFFFF	#000000	##FFFFFF
##121B3C	1.00	16.83	1.25	16.83
#FFFFFF	16.83	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B1F3D

Deuteranopia (green-blind)

#041B3B

Tritanopia (blue-blind)

#002228

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #121b3c;
/* rgb */ color: rgb(18, 27, 60);
/* oklch */ color: oklch(23.4% 0.064 269.4);

Tailwind

colors: {
  custom: {
    50: '#555672',
    500: '#121b3c',
    950: '#000000',
  },
}

SCSS

$custom: #121b3c;
$custom-light: #555672;
$custom-dark: #000000;

JSON

{
  "hex": "#121b3c",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 60
  },
  "hsl": {
    "h": 227.143,
    "s": 53.846,
    "l": 15.294
  },
  "oklch": {
    "l": 0.23449,
    "c": 0.06444,
    "h": 269.4
  },
  "luminance": 0.01239
}

Semantic roles & 50–950 ramp

primary

#121B3C

secondary

#756735

accent

#BE4BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #121B3C

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

Preview Lab → · Contrast checker → · Palette generator →