#101B4D#101B4D

#101B4D is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.093 H 269.0°. Best body text is #FFFFFF at 16.33:1 contrast (WCAG AA passes).

Color values

HEX	#101B4D
RGB	rgb(16, 27, 77)
HSL	hsl(229, 66%, 18%)
HSV	hsv(229, 79%, 30%)
CMYK	cmyk(79.2%, 64.9%, 0%, 69.8%)
CIE-LAB	lab(12.15, 15.40, -32.31)
CIE-LCH	lch(12.15, 35.79, 295.49°)
OKLab	oklab(24.86% -0.0016 -0.0932)
OKLCH	oklch(24.86% 0.093 269)
XYZ	xyz(1.9447, 1.4296, 7.1932)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B4D #4D4210

analogous

#10394D #101B4D #23104D

triadic

#101B4D #4D101B #1B4D10

tetradic

#101B4D #4D1039 #4D4210 #104D23

square

#101B4D #4D1039 #4D4210 #104D23

split-complementary

#101B4D #4D2310 #394D10

monochromatic

#050919 #05091A #101B4D #1B2D80 #253FB2

Accessibility & contrast

On white

16.33

#101B4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#101B4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B4D

16.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B4D	#FFFFFF	#000000	##FFFFFF
##101B4D	1.00	16.33	1.29	16.33
#FFFFFF	16.33	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234F

Deuteranopia (green-blind)

#001D4C

Tritanopia (blue-blind)

#002731

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #101b4d;
/* rgb */ color: rgb(16, 27, 77);
/* oklch */ color: oklch(24.9% 0.093 269.0);

Tailwind

colors: {
  custom: {
    50: '#58577f',
    500: '#101b4d',
    950: '#000000',
  },
}

SCSS

$custom: #101b4d;
$custom-light: #58577f;
$custom-dark: #000000;

JSON

{
  "hex": "#101b4d",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 77
  },
  "hsl": {
    "h": 229.18,
    "s": 65.591,
    "l": 18.235
  },
  "oklch": {
    "l": 0.24861,
    "c": 0.09322,
    "h": 269
  },
  "luminance": 0.0143
}

Semantic roles & 50–950 ramp

primary

#101B4D

secondary

#877832

accent

#CA3FE9

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #101B4D

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

Preview Lab → · Contrast checker → · Palette generator →