#00121B#00121B

#00121B is a very dark, muted cyan. Relative luminance 0.005; OKLCH L 17.0% C 0.034 H 228.9°. Best body text is #FFFFFF at 19.05:1 contrast (WCAG AA passes).

Color values

HEX	#00121B
RGB	rgb(0, 18, 27)
HSL	hsl(200, 100%, 5%)
HSV	hsv(200, 100%, 11%)
CMYK	cmyk(100%, 33.3%, 0%, 89.4%)
CIE-LAB	lab(4.62, -2.96, -7.86)
CIE-LCH	lch(4.62, 8.40, 249.36°)
OKLab	oklab(17.04% -0.022 -0.0253)
OKLCH	oklch(17.04% 0.034 228.9)
XYZ	xyz(0.4141, 0.5117, 1.1136)
Luminance	0.0051 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#00121B #1B0900

analogous

#001B16 #00121B #00041B

triadic

#00121B #1B0012 #121B00

tetradic

#00121B #16001B #1B0900 #041B00

square

#00121B #16001B #1B0900 #041B00

split-complementary

#00121B #1B0004 #1B1600

monochromatic

#00141F #00141F #00141F #003B58 #006495

Accessibility & contrast

On white

19.05

#00121B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#00121B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #00121B

19.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##00121B	#FFFFFF	#000000	##FFFFFF
##00121B	1.00	19.05	1.10	19.05
#FFFFFF	19.05	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D121B

Deuteranopia (green-blind)

#090F1B

Tritanopia (blue-blind)

#001515

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #00121b;
/* rgb */ color: rgb(0, 18, 27);
/* oklch */ color: oklch(17.0% 0.034 228.9);

Tailwind

colors: {
  custom: {
    50: '#465057',
    500: '#00121b',
    950: '#000000',
  },
}

SCSS

$custom: #00121b;
$custom-light: #465057;
$custom-dark: #000000;

JSON

{
  "hex": "#00121b",
  "rgb": {
    "r": 0,
    "g": 18,
    "b": 27
  },
  "hsl": {
    "h": 200,
    "s": 100,
    "l": 5.294
  },
  "oklch": {
    "l": 0.17035,
    "c": 0.03353,
    "h": 228.9
  },
  "luminance": 0.00512
}

Semantic roles & 50–950 ramp

primary

#00121B

secondary

#652E12

accent

#7029FF

background

#F3F4F5

surface

#E5E7E9

border

#C1C3C5

text

#000203

muted

#767878

Preview Lab

Preview with #00121B

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

Preview Lab → · Contrast checker → · Palette generator →