#100A39#100A39

#100A39 is a very dark, moderate blue. Relative luminance 0.006; OKLCH L 19.2% C 0.086 H 280.4°. Best body text is #FFFFFF at 18.67:1 contrast (WCAG AA passes).

Color values

HEX	#100A39
RGB	rgb(16, 10, 57)
HSL	hsl(248, 70%, 13%)
HSV	hsv(248, 82%, 22%)
CMYK	cmyk(71.9%, 82.5%, 0%, 77.6%)
CIE-LAB	lab(5.62, 18.52, -28.84)
CIE-LCH	lch(5.62, 34.27, 302.71°)
OKLab	oklab(19.25% 0.0155 -0.0846)
OKLCH	oklch(19.25% 0.086 280.4)
XYZ	xyz(1.0605, 0.6226, 3.9344)
Luminance	0.0062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A39 #33390A

analogous

#0A1B39 #100A39 #270A39

triadic

#100A39 #39100A #0A3910

tetradic

#100A39 #390A1B #33390A #0A3927

square

#100A39 #390A1B #33390A #0A3927

split-complementary

#100A39 #39270A #1B390A

monochromatic

#07051A #07051A #100A39 #1F136D #2D1CA1

Accessibility & contrast

On white

18.67

#100A39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.12

#100A39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A39

18.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A39	#FFFFFF	#000000	##FFFFFF
##100A39	1.00	18.67	1.12	18.67
#FFFFFF	18.67	1.00	21.00	1.00
#000000	1.12	21.00	1.00	21.00
##FFFFFF	18.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00143A

Deuteranopia (green-blind)

#001138

Tritanopia (blue-blind)

#001720

Achromatopsia (no color)

#121212

Design tokens & code

CSS

--color: #100a39;
/* rgb */ color: rgb(16, 10, 57);
/* oklch */ color: oklch(19.2% 0.086 280.4);

Tailwind

colors: {
  custom: {
    50: '#544a70',
    500: '#100a39',
    950: '#000000',
  },
}

SCSS

$custom: #100a39;
$custom-light: #544a70;
$custom-dark: #000000;

JSON

{
  "hex": "#100a39",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 57
  },
  "hsl": {
    "h": 247.66,
    "s": 70.149,
    "l": 13.137
  },
  "oklch": {
    "l": 0.19248,
    "c": 0.08599,
    "h": 280.4
  },
  "luminance": 0.00623
}

Semantic roles & 50–950 ramp

primary

#100A39

secondary

#6C7628

accent

#ED3BD6

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030107

muted

#78777A

Preview Lab

Preview with #100A39

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

Preview Lab → · Contrast checker → · Palette generator →