#121F3B#121F3B

#121F3B is a very dark, muted blue. Relative luminance 0.014; OKLCH L 24.4% C 0.057 H 263.9°. Best body text is #FFFFFF at 16.34:1 contrast (WCAG AA passes).

Color values

HEX	#121F3B
RGB	rgb(18, 31, 59)
HSL	hsl(221, 53%, 15%)
HSV	hsv(221, 69%, 23%)
CMYK	cmyk(69.5%, 47.5%, 0%, 76.9%)
CIE-LAB	lab(12.12, 5.01, -19.79)
CIE-LCH	lch(12.12, 20.42, 284.21°)
OKLab	oklab(24.41% -0.006 -0.0563)
OKLCH	oklch(24.41% 0.057 263.9)
XYZ	xyz(1.5286, 1.4242, 4.3312)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F3B #3B2E12

analogous

#12333B #121F3B #1A123B

triadic

#121F3B #3B121F #1F3B12

tetradic

#121F3B #3B1233 #3B2E12 #123B1A

square

#121F3B #3B1233 #3B2E12 #123B1A

split-complementary

#121F3B #3B1A12 #333B12

monochromatic

#070C17 #070C17 #121F3B #20386A #2F5099

Accessibility & contrast

On white

16.34

#121F3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#121F3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F3B

16.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F3B	#FFFFFF	#000000	##FFFFFF
##121F3B	1.00	16.34	1.28	16.34
#FFFFFF	16.34	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13223C

Deuteranopia (green-blind)

#0D1E3A

Tritanopia (blue-blind)

#00252A

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #121f3b;
/* rgb */ color: rgb(18, 31, 59);
/* oklch */ color: oklch(24.4% 0.057 263.9);

Tailwind

colors: {
  custom: {
    50: '#545a71',
    500: '#121f3b',
    950: '#000000',
  },
}

SCSS

$custom: #121f3b;
$custom-light: #545a71;
$custom-dark: #000000;

JSON

{
  "hex": "#121f3b",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 59
  },
  "hsl": {
    "h": 220.976,
    "s": 53.247,
    "l": 15.098
  },
  "oklch": {
    "l": 0.24406,
    "c": 0.05662,
    "h": 263.9
  },
  "luminance": 0.01424
}

Semantic roles & 50–950 ramp

primary

#121F3B

secondary

#746035

accent

#AF4BDD

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #121F3B

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

Preview Lab → · Contrast checker → · Palette generator →