#010B21#010B21

#010B21 is a very dark, muted blue. Relative luminance 0.004; OKLCH L 15.4% C 0.051 H 258.2°. Best body text is #FFFFFF at 19.60:1 contrast (WCAG AA passes).

Color values

HEX	#010B21
RGB	rgb(1, 11, 33)
HSL	hsl(221, 94%, 7%)
HSV	hsv(221, 97%, 13%)
CMYK	cmyk(97%, 66.7%, 0%, 87.1%)
CIE-LAB	lab(3.21, 2.81, -14.67)
CIE-LCH	lch(3.21, 14.93, 280.85°)
OKLab	oklab(15.41% -0.0104 -0.0497)
OKLCH	oklch(15.41% 0.051 258.2)
XYZ	xyz(0.4066, 0.3556, 1.4857)
Luminance	0.0036 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#010B21 #211701

analogous

#011B21 #010B21 #070121

triadic

#010B21 #21010B #0B2101

tetradic

#010B21 #21011B #211701 #012107

square

#010B21 #21011B #211701 #012107

split-complementary

#010B21 #210701 #1B2101

monochromatic

#010A1E #010A1E #010B21 #031F5C #053398

Accessibility & contrast

On white

19.60

#010B21 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#010B21 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #010B21

19.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##010B21	#FFFFFF	#000000	##FFFFFF
##010B21	1.00	19.60	1.07	19.60
#FFFFFF	19.60	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#010D22

Deuteranopia (green-blind)

#000A21

Tritanopia (blue-blind)

#001014

Achromatopsia (no color)

#0C0C0C

Design tokens & code

CSS

--color: #010b21;
/* rgb */ color: rgb(1, 11, 33);
/* oklch */ color: oklch(15.4% 0.051 258.2);

Tailwind

colors: {
  custom: {
    50: '#464c5c',
    500: '#010b21',
    950: '#000000',
  },
}

SCSS

$custom: #010b21;
$custom-light: #464c5c;
$custom-dark: #000000;

JSON

{
  "hex": "#010b21",
  "rgb": {
    "r": 1,
    "g": 11,
    "b": 33
  },
  "hsl": {
    "h": 221.25,
    "s": 94.118,
    "l": 6.667
  },
  "oklch": {
    "l": 0.15414,
    "c": 0.05082,
    "h": 258.2
  },
  "luminance": 0.00356
}

Semantic roles & 50–950 ramp

primary

#010B21

secondary

#684E15

accent

#BC29FF

background

#F4F4F5

surface

#E6E7E9

border

#C2C3C5

text

#000104

muted

#777779

Preview Lab

Preview with #010B21

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

Preview Lab → · Contrast checker → · Palette generator →