#011531#011531

#011531 is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 19.8% C 0.063 H 255.4°. Best body text is #FFFFFF at 18.21:1 contrast (WCAG AA passes).

Color values

HEX	#011531
RGB	rgb(1, 21, 49)
HSL	hsl(215, 96%, 10%)
HSV	hsv(215, 98%, 19%)
CMYK	cmyk(98%, 57.1%, 0%, 80.8%)
CIE-LAB	lab(6.90, 4.44, -20.97)
CIE-LCH	lch(6.90, 21.44, 281.95°)
OKLab	oklab(19.83% -0.0158 -0.0606)
OKLCH	oklch(19.83% 0.063 255.4)
XYZ	xyz(0.8349, 0.7644, 3.0087)
Luminance	0.0076 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#011531 #311D01

analogous

#012D31 #011531 #050131

triadic

#011531 #310115 #153101

tetradic

#011531 #31012D #311D01 #013105

square

#011531 #31012D #311D01 #013105

split-complementary

#011531 #310501 #2D3101

monochromatic

#010D1E #010D1E #011531 #022F6D #0348A9

Accessibility & contrast

On white

18.21

#011531 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#011531 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #011531

18.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##011531	#FFFFFF	#000000	##FFFFFF
##011531	1.00	18.21	1.15	18.21
#FFFFFF	18.21	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051832

Deuteranopia (green-blind)

#001330

Tritanopia (blue-blind)

#001C20

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #011531;
/* rgb */ color: rgb(1, 21, 49);
/* oklch */ color: oklch(19.8% 0.063 255.4);

Tailwind

colors: {
  custom: {
    50: '#4a5169',
    500: '#011531',
    950: '#000000',
  },
}

SCSS

$custom: #011531;
$custom-light: #4a5169;
$custom-dark: #000000;

JSON

{
  "hex": "#011531",
  "rgb": {
    "r": 1,
    "g": 21,
    "b": 49
  },
  "hsl": {
    "h": 215,
    "s": 96,
    "l": 9.804
  },
  "oklch": {
    "l": 0.19828,
    "c": 0.06267,
    "h": 255.4
  },
  "luminance": 0.00765
}

Semantic roles & 50–950 ramp

primary

#011531

secondary

#774F17

accent

#A629FF

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010206

muted

#77787A

Preview Lab

Preview with #011531

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

Preview Lab → · Contrast checker → · Palette generator →