#121B3D#121B3D

#121B3D is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 23.5% C 0.066 H 269.6°. Best body text is #FFFFFF at 16.80:1 contrast (WCAG AA passes).

Color values

HEX	#121B3D
RGB	rgb(18, 27, 61)
HSL	hsl(227, 54%, 15%)
HSV	hsv(227, 70%, 24%)
CMYK	cmyk(70.5%, 55.7%, 0%, 76.1%)
CIE-LAB	lab(10.92, 8.93, -23.13)
CIE-LCH	lch(10.92, 24.80, 291.12°)
OKLab	oklab(23.53% -0.0005 -0.0662)
OKLCH	oklch(23.53% 0.066 269.6)
XYZ	xyz(1.4834, 1.2493, 4.5769)
Luminance	0.0125 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B3D #3D3412

analogous

#12303D #121B3D #1E123D

triadic

#121B3D #3D121B #1B3D12

tetradic

#121B3D #3D1230 #3D3412 #123D1E

square

#121B3D #3D1230 #3D3412 #123D1E

split-complementary

#121B3D #3D1E12 #303D12

monochromatic

#070A18 #070A18 #121B3D #20306C #2E459C

Accessibility & contrast

On white

16.80

#121B3D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#121B3D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B3D

16.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B3D	#FFFFFF	#000000	##FFFFFF
##121B3D	1.00	16.80	1.25	16.80
#FFFFFF	16.80	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A1F3E

Deuteranopia (green-blind)

#031B3C

Tritanopia (blue-blind)

#002329

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #121b3d;
/* rgb */ color: rgb(18, 27, 61);
/* oklch */ color: oklch(23.5% 0.066 269.6);

Tailwind

colors: {
  custom: {
    50: '#555673',
    500: '#121b3d',
    950: '#000000',
  },
}

SCSS

$custom: #121b3d;
$custom-light: #555673;
$custom-dark: #000000;

JSON

{
  "hex": "#121b3d",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 61
  },
  "hsl": {
    "h": 227.442,
    "s": 54.43,
    "l": 15.49
  },
  "oklch": {
    "l": 0.23532,
    "c": 0.06617,
    "h": 269.6
  },
  "luminance": 0.01249
}

Semantic roles & 50–950 ramp

primary

#121B3D

secondary

#766835

accent

#BF4ADE

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #121B3D

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

Preview Lab → · Contrast checker → · Palette generator →