#121F2B#121F2B

#121F2B is a very dark, muted cyan. Relative luminance 0.013; OKLCH L 23.3% C 0.030 H 247.2°. Best body text is #FFFFFF at 16.71:1 contrast (WCAG AA passes).

Color values

HEX	#121F2B
RGB	rgb(18, 31, 43)
HSL	hsl(209, 41%, 12%)
HSV	hsv(209, 58%, 17%)
CMYK	cmyk(58.1%, 27.9%, 0%, 83.1%)
CIE-LAB	lab(11.16, -1.43, -9.80)
CIE-LCH	lch(11.16, 9.91, 261.72°)
OKLab	oklab(23.34% -0.0114 -0.0273)
OKLCH	oklch(23.34% 0.03 247.2)
XYZ	xyz(1.1753, 1.2829, 2.4707)
Luminance	0.0128 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F2B #2B1E12

analogous

#122B2B #121F2B #12132B

triadic

#121F2B #2B121F #1F2B12

tetradic

#121F2B #2B122B #2B1E12 #132B12

square

#121F2B #2B122B #2B1E12 #132B12

split-complementary

#121F2B #2B1213 #2B2B12

monochromatic

#091016 #091016 #121F2B #243E56 #365D81

Accessibility & contrast

On white

16.71

#121F2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#121F2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F2B

16.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F2B	#FFFFFF	#000000	##FFFFFF
##121F2B	1.00	16.71	1.26	16.71
#FFFFFF	16.71	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A1F2C

Deuteranopia (green-blind)

#171D2B

Tritanopia (blue-blind)

#072223

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #121f2b;
/* rgb */ color: rgb(18, 31, 43);
/* oklch */ color: oklch(23.3% 0.030 247.2);

Tailwind

colors: {
  custom: {
    50: '#515a64',
    500: '#121f2b',
    950: '#000000',
  },
}

SCSS

$custom: #121f2b;
$custom-light: #515a64;
$custom-dark: #000000;

JSON

{
  "hex": "#121f2b",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 43
  },
  "hsl": {
    "h": 208.8,
    "s": 40.984,
    "l": 11.961
  },
  "oklch": {
    "l": 0.2334,
    "c": 0.0296,
    "h": 247.2
  },
  "luminance": 0.01283
}

Semantic roles & 50–950 ramp

primary

#121F2B

secondary

#624C36

accent

#9157D1

background

#F4F5F5

surface

#E7E9EA

border

#C3C5C6

text

#020305

muted

#787879

Preview Lab

Preview with #121F2B

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

Preview Lab → · Contrast checker → · Palette generator →