#101B4A#101B4A

#101B4A is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.088 H 268.9°. Best body text is #FFFFFF at 16.44:1 contrast (WCAG AA passes).

Color values

HEX	#101B4A
RGB	rgb(16, 27, 74)
HSL	hsl(229, 64%, 18%)
HSV	hsv(229, 78%, 29%)
CMYK	cmyk(78.4%, 63.5%, 0%, 71%)
CIE-LAB	lab(11.88, 14.11, -30.69)
CIE-LCH	lch(11.88, 33.78, 294.70°)
OKLab	oklab(24.57% -0.0017 -0.0884)
OKLCH	oklch(24.57% 0.088 268.9)
XYZ	xyz(1.8412, 1.3883, 6.6482)
Luminance	0.0139 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B4A #4A3F10

analogous

#10384A #101B4A #22104A

triadic

#101B4A #4A101B #1B4A10

tetradic

#101B4A #4A1038 #4A3F10 #104A22

square

#101B4A #4A1038 #4A3F10 #104A22

split-complementary

#101B4A #4A2210 #384A10

monochromatic

#050919 #050919 #101B4A #1B2D7C #2640AF

Accessibility & contrast

On white

16.44

#101B4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#101B4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B4A

16.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B4A	#FFFFFF	#000000	##FFFFFF
##101B4A	1.00	16.44	1.28	16.44
#FFFFFF	16.44	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00224C

Deuteranopia (green-blind)

#001D49

Tritanopia (blue-blind)

#00272F

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #101b4a;
/* rgb */ color: rgb(16, 27, 74);
/* oklch */ color: oklch(24.6% 0.088 268.9);

Tailwind

colors: {
  custom: {
    50: '#58567d',
    500: '#101b4a',
    950: '#000000',
  },
}

SCSS

$custom: #101b4a;
$custom-light: #58567d;
$custom-dark: #000000;

JSON

{
  "hex": "#101b4a",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 74
  },
  "hsl": {
    "h": 228.621,
    "s": 64.444,
    "l": 17.647
  },
  "oklch": {
    "l": 0.2457,
    "c": 0.08846,
    "h": 268.9
  },
  "luminance": 0.01388
}

Semantic roles & 50–950 ramp

primary

#101B4A

secondary

#847432

accent

#C840E7

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#040309

muted

#79787B

Preview Lab

Preview with #101B4A

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

Preview Lab → · Contrast checker → · Palette generator →