#100F39#100F39

#100F39 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.2% C 0.079 H 277.7°. Best body text is #FFFFFF at 18.27:1 contrast (WCAG AA passes).

Color values

HEX	#100F39
RGB	rgb(16, 15, 57)
HSL	hsl(241, 58%, 14%)
HSV	hsv(241, 74%, 22%)
CMYK	cmyk(71.9%, 73.7%, 0%, 77.6%)
CIE-LAB	lab(6.75, 15.82, -27.01)
CIE-LCH	lch(6.75, 31.31, 300.35°)
OKLab	oklab(20.21% 0.0106 -0.0781)
OKLCH	oklch(20.21% 0.079 277.7)
XYZ	xyz(1.1228, 0.7471, 3.9551)
Luminance	0.0075 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Dark Navy

#000435

ΔE00 3.30

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100F39 #38390F

analogous

#0F2339 #100F39 #250F39

triadic

#100F39 #39100F #0F3910

tetradic

#100F39 #390F23 #38390F #0F3925

square

#100F39 #390F23 #38390F #0F3925

split-complementary

#100F39 #39250F #23390F

monochromatic

#070618 #070618 #100F39 #1E1C69 #2B299A

Accessibility & contrast

On white

18.27

#100F39 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#100F39 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100F39

18.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100F39	#FFFFFF	#000000	##FFFFFF
##100F39	1.00	18.27	1.15	18.27
#FFFFFF	18.27	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00173A

Deuteranopia (green-blind)

#001338

Tritanopia (blue-blind)

#001A22

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #100f39;
/* rgb */ color: rgb(16, 15, 57);
/* oklch */ color: oklch(20.2% 0.079 277.7);

Tailwind

colors: {
  custom: {
    50: '#544d70',
    500: '#100f39',
    950: '#000000',
  },
}

SCSS

$custom: #100f39;
$custom-light: #544d70;
$custom-dark: #000000;

JSON

{
  "hex": "#100f39",
  "rgb": {
    "r": 16,
    "g": 15,
    "b": 57
  },
  "hsl": {
    "h": 241.429,
    "s": 58.333,
    "l": 14.118
  },
  "oklch": {
    "l": 0.20214,
    "c": 0.07887,
    "h": 277.7
  },
  "luminance": 0.00747
}

Semantic roles & 50–950 ramp

primary

#100F39

secondary

#727330

accent

#E246DE

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030107

muted

#78777A

Preview Lab

Preview with #100F39

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

Preview Lab → · Contrast checker → · Palette generator →