#100B2B#100B2B

#100B2B is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.9% C 0.062 H 285.4°. Best body text is #FFFFFF at 19.01:1 contrast (WCAG AA passes).

Color values

HEX	#100B2B
RGB	rgb(16, 11, 43)
HSL	hsl(249, 59%, 11%)
HSV	hsv(249, 74%, 17%)
CMYK	cmyk(62.8%, 74.4%, 0%, 83.1%)
CIE-LAB	lab(4.73, 11.12, -19.90)
CIE-LCH	lch(4.73, 22.80, 299.18°)
OKLab	oklab(17.93% 0.0165 -0.0599)
OKLCH	oklch(17.93% 0.062 285.4)
XYZ	xyz(0.7693, 0.5239, 2.3456)
Luminance	0.0052 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100B2B #262B0B

analogous

#0B162B #100B2B #200B2B

triadic

#100B2B #2B100B #0B2B10

tetradic

#100B2B #2B0B16 #262B0B #0B2B20

square

#100B2B #2B0B16 #262B0B #0B2B20

split-complementary

#100B2B #2B200B #162B0B

monochromatic

#090618 #090618 #100B2B #22175C #34248C

Accessibility & contrast

On white

19.01

#100B2B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#100B2B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100B2B

19.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100B2B	#FFFFFF	#000000	##FFFFFF
##100B2B	1.00	19.01	1.10	19.01
#FFFFFF	19.01	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00112C

Deuteranopia (green-blind)

#000F2A

Tritanopia (blue-blind)

#061219

Achromatopsia (no color)

#101010

Design tokens & code

CSS

--color: #100b2b;
/* rgb */ color: rgb(16, 11, 43);
/* oklch */ color: oklch(17.9% 0.062 285.4);

Tailwind

colors: {
  custom: {
    50: '#504b64',
    500: '#100b2b',
    950: '#000000',
  },
}

SCSS

$custom: #100b2b;
$custom-light: #504b64;
$custom-dark: #000000;

JSON

{
  "hex": "#100b2b",
  "rgb": {
    "r": 16,
    "g": 11,
    "b": 43
  },
  "hsl": {
    "h": 249.375,
    "s": 59.259,
    "l": 10.588
  },
  "oklch": {
    "l": 0.17933,
    "c": 0.06211,
    "h": 285.4
  },
  "luminance": 0.00524
}

Semantic roles & 50–950 ramp

primary

#100B2B

secondary

#5E672B

accent

#E245CA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020105

muted

#78777A

Preview Lab

Preview with #100B2B

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

Preview Lab → · Contrast checker → · Palette generator →