#101B2B#101B2B

#101B2B is a very dark, muted blue. Relative luminance 0.011; OKLCH L 22.0% C 0.035 H 257.7°. Best body text is #FFFFFF at 17.30:1 contrast (WCAG AA passes).

Color values

HEX	#101B2B
RGB	rgb(16, 27, 43)
HSL	hsl(216, 46%, 12%)
HSV	hsv(216, 63%, 17%)
CMYK	cmyk(62.8%, 37.2%, 0%, 83.1%)
CIE-LAB	lab(9.55, 0.93, -12.31)
CIE-LCH	lch(9.55, 12.34, 274.33°)
OKLab	oklab(22.04% -0.0075 -0.0346)
OKLCH	oklch(22.04% 0.035 257.7)
XYZ	xyz(1.0415, 1.0684, 2.4364)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B2B #2B2010

analogous

#10292B #101B2B #13102B

triadic

#101B2B #2B101B #1B2B10

tetradic

#101B2B #2B1029 #2B2010 #102B13

square

#101B2B #2B1029 #2B2010 #102B13

split-complementary

#101B2B #2B1310 #292B10

monochromatic

#080E16 #080E16 #101B2B #213758 #315384

Accessibility & contrast

On white

17.30

#101B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#101B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B2B

17.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B2B	#FFFFFF	#000000	##FFFFFF
##101B2B	1.00	17.30	1.21	17.30
#FFFFFF	17.30	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#151C2C

Deuteranopia (green-blind)

#12192B

Tritanopia (blue-blind)

#041F21

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #101b2b;
/* rgb */ color: rgb(16, 27, 43);
/* oklch */ color: oklch(22.0% 0.035 257.7);

Tailwind

colors: {
  custom: {
    50: '#505764',
    500: '#101b2b',
    950: '#000000',
  },
}

SCSS

$custom: #101b2b;
$custom-light: #505764;
$custom-dark: #000000;

JSON

{
  "hex": "#101b2b",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 43
  },
  "hsl": {
    "h": 215.556,
    "s": 45.763,
    "l": 11.569
  },
  "oklch": {
    "l": 0.22042,
    "c": 0.03538,
    "h": 257.7
  },
  "luminance": 0.01068
}

Semantic roles & 50–950 ramp

primary

#101B2B

secondary

#645033

accent

#A052D5

background

#F4F5F5

surface

#E7E9EA

border

#C3C5C6

text

#020305

muted

#787879

Preview Lab

Preview with #101B2B

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

Preview Lab → · Contrast checker → · Palette generator →