#100A4E#100A4E

#100A4E is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.8% C 0.116 H 274.9°. Best body text is #FFFFFF at 17.87:1 contrast (WCAG AA passes).

Color values

HEX	#100A4E
RGB	rgb(16, 10, 78)
HSL	hsl(245, 77%, 17%)
HSV	hsv(245, 87%, 31%)
CMYK	cmyk(79.5%, 87.2%, 0%, 69.4%)
CIE-LAB	lab(7.92, 27.56, -39.95)
CIE-LCH	lch(7.92, 48.54, 304.60°)
OKLab	oklab(21.84% 0.0098 -0.1155)
OKLCH	oklch(21.84% 0.116 274.9)
XYZ	xyz(1.6969, 0.8771, 7.2861)
Luminance	0.0088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.77

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100A4E #484E0A

analogous

#0A264E #100A4E #320A4E

triadic

#100A4E #4E100A #0A4E10

tetradic

#100A4E #4E0A26 #484E0A #0A4E32

square

#100A4E #4E0A26 #484E0A #0A4E32

split-complementary

#100A4E #4E320A #264E0A

monochromatic

#06031B #06031B #100A4E #1B1184 #2618BA

Accessibility & contrast

On white

17.87

#100A4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#100A4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100A4E

17.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100A4E	#FFFFFF	#000000	##FFFFFF
##100A4E	1.00	17.87	1.18	17.87
#FFFFFF	17.87	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A50

Deuteranopia (green-blind)

#00144D

Tritanopia (blue-blind)

#001F2C

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #100a4e;
/* rgb */ color: rgb(16, 10, 78);
/* oklch */ color: oklch(21.8% 0.116 274.9);

Tailwind

colors: {
  custom: {
    50: '#5b4b80',
    500: '#100a4e',
    950: '#000000',
  },
}

SCSS

$custom: #100a4e;
$custom-light: #5b4b80;
$custom-dark: #000000;

JSON

{
  "hex": "#100a4e",
  "rgb": {
    "r": 16,
    "g": 10,
    "b": 78
  },
  "hsl": {
    "h": 245.294,
    "s": 77.273,
    "l": 17.255
  },
  "oklch": {
    "l": 0.21837,
    "c": 0.11595,
    "h": 274.9
  },
  "luminance": 0.00877
}

Semantic roles & 50–950 ramp

primary

#100A4E

secondary

#828B29

accent

#F434E3

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#04010A

muted

#79777C

Preview Lab

Preview with #100A4E

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

Preview Lab → · Contrast checker → · Palette generator →