#121D3F#121D3F

#121D3F is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.2% C 0.067 H 267.7°. Best body text is #FFFFFF at 16.49:1 contrast (WCAG AA passes).

Color values

HEX	#121D3F
RGB	rgb(18, 29, 63)
HSL	hsl(225, 56%, 16%)
HSV	hsv(225, 71%, 25%)
CMYK	cmyk(71.4%, 54%, 0%, 75.3%)
CIE-LAB	lab(11.73, 8.23, -23.24)
CIE-LCH	lch(11.73, 24.66, 289.51°)
OKLab	oklab(24.2% -0.0026 -0.0664)
OKLCH	oklch(24.2% 0.067 267.7)
XYZ	xyz(1.5857, 1.3661, 4.8818)
Luminance	0.0137 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121D3F #3F3412

analogous

#12333F #121D3F #1D123F

triadic

#121D3F #3F121D #1D3F12

tetradic

#121D3F #3F1233 #3F3412 #123F1D

square

#121D3F #3F1233 #3F3412 #123F1D

split-complementary

#121D3F #3F1D12 #333F12

monochromatic

#070B18 #070B18 #121D3F #20336F #2D499E

Accessibility & contrast

On white

16.49

#121D3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.27

#121D3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121D3F

16.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121D3F	#FFFFFF	#000000	##FFFFFF
##121D3F	1.00	16.49	1.27	16.49
#FFFFFF	16.49	1.00	21.00	1.00
#000000	1.27	21.00	1.00	21.00
##FFFFFF	16.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C2140

Deuteranopia (green-blind)

#051D3E

Tritanopia (blue-blind)

#00252A

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #121d3f;
/* rgb */ color: rgb(18, 29, 63);
/* oklch */ color: oklch(24.2% 0.067 267.7);

Tailwind

colors: {
  custom: {
    50: '#555874',
    500: '#121d3f',
    950: '#000000',
  },
}

SCSS

$custom: #121d3f;
$custom-light: #555874;
$custom-dark: #000000;

JSON

{
  "hex": "#121d3f",
  "rgb": {
    "r": 18,
    "g": 29,
    "b": 63
  },
  "hsl": {
    "h": 225.333,
    "s": 55.556,
    "l": 15.882
  },
  "oklch": {
    "l": 0.24201,
    "c": 0.0665,
    "h": 267.7
  },
  "luminance": 0.01366
}

Semantic roles & 50–950 ramp

primary

#121D3F

secondary

#786835

accent

#BA49DF

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #121D3F

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

Preview Lab → · Contrast checker → · Palette generator →