#100B31#100B31

#100B31 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 18.5% C 0.072 H 282.8°. Best body text is #FFFFFF at 18.85:1 contrast (WCAG AA passes).

Color values

HEX	#100B31
RGB	rgb(16, 11, 49)
HSL	hsl(248, 63%, 12%)
HSV	hsv(248, 78%, 19%)
CMYK	cmyk(67.3%, 77.6%, 0%, 80.8%)
CIE-LAB	lab(5.16, 14.09, -23.71)
CIE-LCH	lch(5.16, 27.58, 300.71°)
OKLab	oklab(18.55% 0.0159 -0.0703)
OKLCH	oklch(18.55% 0.072 282.8)
XYZ	xyz(0.8876, 0.5712, 2.9686)
Luminance	0.0057 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B31 #2C310B

analogous

#0B1931 #100B31 #230B31

triadic

#100B31 #31100B #0B3110

tetradic

#100B31 #310B19 #2C310B #0B3123

square

#100B31 #310B19 #2C310B #0B3123

split-complementary

#100B31 #31230B #19310B

monochromatic

#080619 #080619 #100B31 #201663 #312195

Accessibility & contrast

On white

18.85

#100B31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.11

#100B31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B31

18.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B31	#FFFFFF	#000000	##FFFFFF
##100B31	1.00	18.85	1.11	18.85
#FFFFFF	18.85	1.00	21.00	1.00
#000000	1.11	21.00	1.00	21.00
##FFFFFF	18.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001232

Deuteranopia (green-blind)

#001030

Tritanopia (blue-blind)

#02141C

Achromatopsia (no color)

#111111

Design tokens & code

CSS

--color: #100b31;
/* rgb */ color: rgb(16, 11, 49);
/* oklch */ color: oklch(18.5% 0.072 282.8);

Tailwind

colors: {
  custom: {
    50: '#514b69',
    500: '#100b31',
    950: '#000000',
  },
}

SCSS

$custom: #100b31;
$custom-light: #514b69;
$custom-dark: #000000;

JSON

{
  "hex": "#100b31",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 49
  },
  "hsl": {
    "h": 247.895,
    "s": 63.333,
    "l": 11.765
  },
  "oklch": {
    "l": 0.18548,
    "c": 0.07205,
    "h": 282.8
  },
  "luminance": 0.00571
}

Semantic roles & 50–950 ramp

primary

#100B31

secondary

#656E2A

accent

#E641D1

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020106

muted

#78777A

Preview Lab

Preview with #100B31

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

Preview Lab → · Contrast checker → · Palette generator →