#101C4B#101C4B

#101C4B is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.089 H 268.4°. Best body text is #FFFFFF at 16.28:1 contrast (WCAG AA passes).

Color values

HEX	#101C4B
RGB	rgb(16, 28, 75)
HSL	hsl(228, 65%, 18%)
HSV	hsv(228, 79%, 29%)
CMYK	cmyk(78.7%, 62.7%, 0%, 70.6%)
CIE-LAB	lab(12.28, 13.78, -30.73)
CIE-LCH	lch(12.28, 33.68, 294.15°)
OKLab	oklab(24.9% -0.0026 -0.0886)
OKLCH	oklch(24.9% 0.089 268.4)
XYZ	xyz(1.8985, 1.4485, 6.8348)
Luminance	0.0145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.32

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101C4B #4B3F10

analogous

#10394B #101C4B #22104B

triadic

#101C4B #4B101C #1C4B10

tetradic

#101C4B #4B1039 #4B3F10 #104B22

square

#101C4B #4B1039 #4B3F10 #104B22

split-complementary

#101C4B #4B2210 #394B10

monochromatic

#050919 #050919 #101C4B #1B2F7D #2642B0

Accessibility & contrast

On white

16.28

#101C4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#101C4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101C4B

16.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101C4B	#FFFFFF	#000000	##FFFFFF
##101C4B	1.00	16.28	1.29	16.28
#FFFFFF	16.28	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234D

Deuteranopia (green-blind)

#001D4A

Tritanopia (blue-blind)

#002830

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #101c4b;
/* rgb */ color: rgb(16, 28, 75);
/* oklch */ color: oklch(24.9% 0.089 268.4);

Tailwind

colors: {
  custom: {
    50: '#58577e',
    500: '#101c4b',
    950: '#000000',
  },
}

SCSS

$custom: #101c4b;
$custom-light: #58577e;
$custom-dark: #000000;

JSON

{
  "hex": "#101c4b",
  "rgb": {
    "r": 16,
    "g": 28,
    "b": 75
  },
  "hsl": {
    "h": 227.797,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.24896,
    "c": 0.0886,
    "h": 268.4
  },
  "luminance": 0.01449
}

Semantic roles & 50–950 ramp

primary

#101C4B

secondary

#857432

accent

#C640E8

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #101C4B

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

Preview Lab → · Contrast checker → · Palette generator →