#100D3B#100D3B

#100D3B is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.0% C 0.085 H 278.4°. Best body text is #FFFFFF at 18.38:1 contrast (WCAG AA passes).

Color values

HEX	#100D3B
RGB	rgb(16, 13, 59)
HSL	hsl(244, 64%, 14%)
HSV	hsv(244, 78%, 23%)
CMYK	cmyk(72.9%, 78%, 0%, 76.9%)
CIE-LAB	lab(6.45, 17.93, -28.95)
CIE-LCH	lch(6.45, 34.05, 301.77°)
OKLab	oklab(20.03% 0.0123 -0.084)
OKLCH	oklch(20.03% 0.085 278.4)
XYZ	xyz(1.1468, 0.7137, 4.2141)
Luminance	0.0071 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D3B #383B0D

analogous

#0D213B #100D3B #270D3B

triadic

#100D3B #3B100D #0D3B10

tetradic

#100D3B #3B0D21 #383B0D #0D3B27

square

#100D3B #3B0D21 #383B0D #0D3B27

split-complementary

#100D3B #3B270D #213B0D

monochromatic

#070619 #070619 #100D3B #1E186D #2B239F

Accessibility & contrast

On white

18.38

#100D3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#100D3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D3B

18.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D3B	#FFFFFF	#000000	##FFFFFF
##100D3B	1.00	18.38	1.14	18.38
#FFFFFF	18.38	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00163C

Deuteranopia (green-blind)

#00123A

Tritanopia (blue-blind)

#001922

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #100d3b;
/* rgb */ color: rgb(16, 13, 59);
/* oklch */ color: oklch(20.0% 0.085 278.4);

Tailwind

colors: {
  custom: {
    50: '#554c71',
    500: '#100d3b',
    950: '#000000',
  },
}

SCSS

$custom: #100d3b;
$custom-light: #554c71;
$custom-dark: #000000;

JSON

{
  "hex": "#100d3b",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 59
  },
  "hsl": {
    "h": 243.913,
    "s": 63.889,
    "l": 14.118
  },
  "oklch": {
    "l": 0.2003,
    "c": 0.08495,
    "h": 278.4
  },
  "luminance": 0.00714
}

Semantic roles & 50–950 ramp

primary

#100D3B

secondary

#72772D

accent

#E741DC

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030108

muted

#78777B

Preview Lab

Preview with #100D3B

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

Preview Lab → · Contrast checker → · Palette generator →