#01042B#01042B

#01042B is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 14.6% C 0.080 H 266.0°. Best body text is #FFFFFF at 19.93:1 contrast (WCAG AA passes).

Color values

HEX	#01042B
RGB	rgb(1, 4, 43)
HSL	hsl(236, 95%, 9%)
HSV	hsv(236, 98%, 17%)
CMYK	cmyk(97.7%, 90.7%, 0%, 83.1%)
CIE-LAB	lab(2.42, 9.73, -23.62)
CIE-LCH	lch(2.42, 25.54, 292.38°)
OKLab	oklab(14.59% -0.0056 -0.08)
OKLCH	oklch(14.59% 0.08 266)
XYZ	xyz(0.4918, 0.2676, 2.3108)
Luminance	0.0027 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#01042B #2B2801

analogous

#01192B #01042B #13012B

triadic

#01042B #2B0104 #042B01

tetradic

#01042B #2B0119 #2B2801 #012B13

square

#01042B #2B0119 #2B2801 #012B13

split-complementary

#01042B #2B1301 #192B01

monochromatic

#01031E #01031E #01042B #020A67 #040FA3

Accessibility & contrast

On white

19.93

#01042B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.05

#01042B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #01042B

19.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##01042B	#FFFFFF	#000000	##FFFFFF
##01042B	1.00	19.93	1.05	19.93
#FFFFFF	19.93	1.00	21.00	1.00
#000000	1.05	21.00	1.00	21.00
##FFFFFF	19.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000B2C

Deuteranopia (green-blind)

#00072A

Tritanopia (blue-blind)

#000F16

Achromatopsia (no color)

#090909

Design tokens & code

CSS

--color: #01042b;
/* rgb */ color: rgb(1, 4, 43);
/* oklch */ color: oklch(14.6% 0.080 266.0);

Tailwind

colors: {
  custom: {
    50: '#474864',
    500: '#01042b',
    950: '#000000',
  },
}

SCSS

$custom: #01042b;
$custom-light: #474864;
$custom-dark: #000000;

JSON

{
  "hex": "#01042b",
  "rgb": {
    "r": 1,
    "g": 4,
    "b": 43
  },
  "hsl": {
    "h": 235.714,
    "s": 95.455,
    "l": 8.627
  },
  "oklch": {
    "l": 0.14591,
    "c": 0.08025,
    "h": 266
  },
  "luminance": 0.00268
}

Semantic roles & 50–950 ramp

primary

#01042B

secondary

#716B17

accent

#F029FF

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010005

muted

#77777A

Preview Lab

Preview with #01042B

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

Preview Lab → · Contrast checker → · Palette generator →