#011231#011231

#011231 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 19.0% C 0.067 H 258.5°. Best body text is #FFFFFF at 18.55:1 contrast (WCAG AA passes).

Color values

HEX	#011231
RGB	rgb(1, 18, 49)
HSL	hsl(219, 96%, 10%)
HSV	hsv(219, 98%, 19%)
CMYK	cmyk(98%, 63.3%, 0%, 80.8%)
CIE-LAB	lab(5.97, 6.35, -22.47)
CIE-LCH	lch(5.97, 23.35, 285.78°)
OKLab	oklab(19% -0.0134 -0.0659)
OKLCH	oklch(19% 0.067 258.5)
XYZ	xyz(0.7830, 0.6607, 2.9914)
Luminance	0.0066 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.91

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#011231 #312001

analogous

#012A31 #011231 #080131

triadic

#011231 #310112 #123101

tetradic

#011231 #31012A #312001 #013108

square

#011231 #31012A #312001 #013108

split-complementary

#011231 #310801 #2A3101

monochromatic

#010B1E #010B1E #011231 #02286D #033EA9

Accessibility & contrast

On white

18.55

#011231 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.13

#011231 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #011231

18.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##011231	#FFFFFF	#000000	##FFFFFF
##011231	1.00	18.55	1.13	18.55
#FFFFFF	18.55	1.00	21.00	1.00
#000000	1.13	21.00	1.00	21.00
##FFFFFF	18.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001632

Deuteranopia (green-blind)

#001130

Tritanopia (blue-blind)

#001A1F

Achromatopsia (no color)

#131313

Design tokens & code

CSS

--color: #011231;
/* rgb */ color: rgb(1, 18, 49);
/* oklch */ color: oklch(19.0% 0.067 258.5);

Tailwind

colors: {
  custom: {
    50: '#4a4f69',
    500: '#011231',
    950: '#000000',
  },
}

SCSS

$custom: #011231;
$custom-light: #4a4f69;
$custom-dark: #000000;

JSON

{
  "hex": "#011231",
  "rgb": {
    "r": 1,
    "g": 18,
    "b": 49
  },
  "hsl": {
    "h": 218.75,
    "s": 96,
    "l": 9.804
  },
  "oklch": {
    "l": 0.18995,
    "c": 0.06724,
    "h": 258.5
  },
  "luminance": 0.00661
}

Semantic roles & 50–950 ramp

primary

#011231

secondary

#775517

accent

#B329FF

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010206

muted

#77787A

Preview Lab

Preview with #011231

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

Preview Lab → · Contrast checker → · Palette generator →