#101F4A#101F4A

#101F4A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.5% C 0.083 H 266.2°. Best body text is #FFFFFF at 15.95:1 contrast (WCAG AA passes).

Color values

HEX	#101F4A
RGB	rgb(16, 31, 74)
HSL	hsl(224, 64%, 18%)
HSV	hsv(224, 78%, 29%)
CMYK	cmyk(78.4%, 58.1%, 0%, 71%)
CIE-LAB	lab(13.13, 11.05, -28.65)
CIE-LCH	lch(13.13, 30.71, 291.09°)
OKLab	oklab(25.52% -0.0055 -0.0824)
OKLCH	oklch(25.52% 0.083 266.2)
XYZ	xyz(1.9393, 1.5843, 6.6808)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F4A #4A3B10

analogous

#103C4A #101F4A #1E104A

triadic

#101F4A #4A101F #1F4A10

tetradic

#101F4A #4A103C #4A3B10 #104A1E

square

#101F4A #4A103C #4A3B10 #104A1E

split-complementary

#101F4A #4A1E10 #3C4A10

monochromatic

#050B19 #050B19 #101F4A #1B347C #2649AF

Accessibility & contrast

On white

15.95

#101F4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#101F4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F4A

15.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F4A	#FFFFFF	#000000	##FFFFFF
##101F4A	1.00	15.95	1.32	15.95
#FFFFFF	15.95	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04254C

Deuteranopia (green-blind)

#001F49

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #101f4a;
/* rgb */ color: rgb(16, 31, 74);
/* oklch */ color: oklch(25.5% 0.083 266.2);

Tailwind

colors: {
  custom: {
    50: '#575a7d',
    500: '#101f4a',
    950: '#000000',
  },
}

SCSS

$custom: #101f4a;
$custom-light: #575a7d;
$custom-dark: #000000;

JSON

{
  "hex": "#101f4a",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 74
  },
  "hsl": {
    "h": 224.483,
    "s": 64.444,
    "l": 17.647
  },
  "oklch": {
    "l": 0.25515,
    "c": 0.08258,
    "h": 266.2
  },
  "luminance": 0.01585
}

Semantic roles & 50–950 ramp

primary

#101F4A

secondary

#846F32

accent

#BC40E7

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #101F4A

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

Preview Lab → · Contrast checker → · Palette generator →