#121F3C#121F3C

#121F3C is a very dark, muted blue. Relative luminance 0.014; OKLCH L 24.5% C 0.058 H 264.3°. Best body text is #FFFFFF at 16.32:1 contrast (WCAG AA passes).

Color values

HEX	#121F3C
RGB	rgb(18, 31, 60)
HSL	hsl(221, 54%, 15%)
HSV	hsv(221, 70%, 24%)
CMYK	cmyk(70%, 48.3%, 0%, 76.5%)
CIE-LAB	lab(12.19, 5.43, -20.39)
CIE-LCH	lch(12.19, 21.10, 284.91°)
OKLab	oklab(24.48% -0.0058 -0.058)
OKLCH	oklch(24.48% 0.058 264.3)
XYZ	xyz(1.5548, 1.4347, 4.4691)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F3C #3C2F12

analogous

#12343C #121F3C #1A123C

triadic

#121F3C #3C121F #1F3C12

tetradic

#121F3C #3C1234 #3C2F12 #123C1A

square

#121F3C #3C1234 #3C2F12 #123C1A

split-complementary

#121F3C #3C1A12 #343C12

monochromatic

#070C18 #070C18 #121F3C #20376B #2E509A

Accessibility & contrast

On white

16.32

#121F3C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#121F3C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F3C

16.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F3C	#FFFFFF	#000000	##FFFFFF
##121F3C	1.00	16.32	1.29	16.32
#FFFFFF	16.32	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12223D

Deuteranopia (green-blind)

#0C1E3B

Tritanopia (blue-blind)

#00262A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #121f3c;
/* rgb */ color: rgb(18, 31, 60);
/* oklch */ color: oklch(24.5% 0.058 264.3);

Tailwind

colors: {
  custom: {
    50: '#555a72',
    500: '#121f3c',
    950: '#000000',
  },
}

SCSS

$custom: #121f3c;
$custom-light: #555a72;
$custom-dark: #000000;

JSON

{
  "hex": "#121f3c",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 60
  },
  "hsl": {
    "h": 221.429,
    "s": 53.846,
    "l": 15.294
  },
  "oklch": {
    "l": 0.24481,
    "c": 0.05834,
    "h": 264.3
  },
  "luminance": 0.01435
}

Semantic roles & 50–950 ramp

primary

#121F3C

secondary

#756135

accent

#B04BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030308

muted

#78787B

Preview Lab

Preview with #121F3C

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

Preview Lab → · Contrast checker → · Palette generator →