#010B2B#010B2B

#010B2B is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.5% C 0.068 H 262.2°. Best body text is #FFFFFF at 19.37:1 contrast (WCAG AA passes).

Color values

HEX	#010B2B
RGB	rgb(1, 11, 43)
HSL	hsl(226, 95%, 9%)
HSV	hsv(226, 98%, 17%)
CMYK	cmyk(97.7%, 74.4%, 0%, 83.1%)
CIE-LAB	lab(3.79, 6.92, -21.45)
CIE-LCH	lch(3.79, 22.53, 287.87°)
OKLab	oklab(16.5% -0.0092 -0.0675)
OKLCH	oklch(16.5% 0.068 262.2)
XYZ	xyz(0.5681, 0.4201, 2.3362)
Luminance	0.0042 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.51

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#010B2B #2B2101

analogous

#01202B #010B2B #0C012B

triadic

#010B2B #2B010B #0B2B01

tetradic

#010B2B #2B0120 #2B2101 #012B0C

square

#010B2B #2B0120 #2B2101 #012B0C

split-complementary

#010B2B #2B0C01 #202B01

monochromatic

#01081E #01081E #010B2B #021A67 #042AA3

Accessibility & contrast

On white

19.37

#010B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#010B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #010B2B

19.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##010B2B	#FFFFFF	#000000	##FFFFFF
##010B2B	1.00	19.37	1.08	19.37
#FFFFFF	19.37	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00102C

Deuteranopia (green-blind)

#000B2A

Tritanopia (blue-blind)

#001319

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #010b2b;
/* rgb */ color: rgb(1, 11, 43);
/* oklch */ color: oklch(16.5% 0.068 262.2);

Tailwind

colors: {
  custom: {
    50: '#484b64',
    500: '#010b2b',
    950: '#000000',
  },
}

SCSS

$custom: #010b2b;
$custom-light: #484b64;
$custom-dark: #000000;

JSON

{
  "hex": "#010b2b",
  "rgb": {
    "r": 1,
    "g": 11,
    "b": 43
  },
  "hsl": {
    "h": 225.714,
    "s": 95.455,
    "l": 8.627
  },
  "oklch": {
    "l": 0.16499,
    "c": 0.0681,
    "h": 262.2
  },
  "luminance": 0.0042
}

Semantic roles & 50–950 ramp

primary

#010B2B

secondary

#715C17

accent

#CC29FF

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010105

muted

#77777A

Preview Lab

Preview with #010B2B

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

Preview Lab → · Contrast checker → · Palette generator →