#100A40#100A40

#100A40 is a very dark, moderate blue. Relative luminance 0.007; OKLCH L 20.1% C 0.096 H 278.2°. Best body text is #FFFFFF at 18.43:1 contrast (WCAG AA passes).

Color values

HEX	#100A40
RGB	rgb(16, 10, 64)
HSL	hsl(247, 73%, 15%)
HSV	hsv(247, 84%, 25%)
CMYK	cmyk(75%, 84.4%, 0%, 74.9%)
CIE-LAB	lab(6.30, 21.82, -32.78)
CIE-LCH	lch(6.30, 39.38, 303.65°)
OKLab	oklab(20.08% 0.0138 -0.0954)
OKLCH	oklch(20.08% 0.096 278.2)
XYZ	xyz(1.2473, 0.6973, 4.9184)
Luminance	0.0070 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 3.23

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A40 #3A400A

analogous

#0A1F40 #100A40 #2B0A40

triadic

#100A40 #40100A #0A4010

tetradic

#100A40 #400A1F #3A400A #0A402B

square

#100A40 #400A1F #3A400A #0A402B

split-complementary

#100A40 #402B0A #1F400A

monochromatic

#07041A #07041A #100A40 #1D1275 #2A1BAA

Accessibility & contrast

On white

18.43

#100A40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.14

#100A40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A40

18.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A40	#FFFFFF	#000000	##FFFFFF
##100A40	1.00	18.43	1.14	18.43
#FFFFFF	18.43	1.00	21.00	1.00
#000000	1.14	21.00	1.00	21.00
##FFFFFF	18.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001642

Deuteranopia (green-blind)

#00123F

Tritanopia (blue-blind)

#001924

Achromatopsia (no color)

#141414

Design tokens & code

CSS

--color: #100a40;
/* rgb */ color: rgb(16, 10, 64);
/* oklch */ color: oklch(20.1% 0.096 278.2);

Tailwind

colors: {
  custom: {
    50: '#564a75',
    500: '#100a40',
    950: '#000000',
  },
}

SCSS

$custom: #100a40;
$custom-light: #564a75;
$custom-dark: #000000;

JSON

{
  "hex": "#100a40",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 64
  },
  "hsl": {
    "h": 246.667,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.2008,
    "c": 0.09635,
    "h": 278.2
  },
  "luminance": 0.00697
}

Semantic roles & 50–950 ramp

primary

#100A40

secondary

#747D29

accent

#F038DB

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030108

muted

#78777B

Preview Lab

Preview with #100A40

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

Preview Lab → · Contrast checker → · Palette generator →