#100F3B#100F3B

#100F3B is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.4% C 0.082 H 277.3°. Best body text is #FFFFFF at 18.20:1 contrast (WCAG AA passes).

Color values

HEX	#100F3B
RGB	rgb(16, 15, 59)
HSL	hsl(241, 59%, 15%)
HSV	hsv(241, 75%, 23%)
CMYK	cmyk(72.9%, 74.6%, 0%, 76.9%)
CIE-LAB	lab(6.93, 16.72, -28.16)
CIE-LCH	lch(6.93, 32.75, 300.70°)
OKLab	oklab(20.43% 0.0104 -0.0814)
OKLCH	oklch(20.43% 0.082 277.3)
XYZ	xyz(1.1737, 0.7675, 4.2231)
Luminance	0.0077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F3B #3A3B0F

analogous

#0F243B #100F3B #260F3B

triadic

#100F3B #3B100F #0F3B10

tetradic

#100F3B #3B0F24 #3A3B0F #0F3B26

square

#100F3B #3B0F24 #3A3B0F #0F3B26

split-complementary

#100F3B #3B260F #243B0F

monochromatic

#070618 #070618 #100F3B #1D1B6C #2A289D

Accessibility & contrast

On white

18.20

#100F3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#100F3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F3B

18.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F3B	#FFFFFF	#000000	##FFFFFF
##100F3B	1.00	18.20	1.15	18.20
#FFFFFF	18.20	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00173C

Deuteranopia (green-blind)

#00133A

Tritanopia (blue-blind)

#001A23

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #100f3b;
/* rgb */ color: rgb(16, 15, 59);
/* oklch */ color: oklch(20.4% 0.082 277.3);

Tailwind

colors: {
  custom: {
    50: '#554d71',
    500: '#100f3b',
    950: '#000000',
  },
}

SCSS

$custom: #100f3b;
$custom-light: #554d71;
$custom-dark: #000000;

JSON

{
  "hex": "#100f3b",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 59
  },
  "hsl": {
    "h": 241.364,
    "s": 59.459,
    "l": 14.51
  },
  "oklch": {
    "l": 0.20427,
    "c": 0.08207,
    "h": 277.3
  },
  "luminance": 0.00768
}

Semantic roles & 50–950 ramp

primary

#100F3B

secondary

#747530

accent

#E345DF

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030108

muted

#78777B

Preview Lab

Preview with #100F3B

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

Preview Lab → · Contrast checker → · Palette generator →