#101C3B#101C3B

#101C3B is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.5% C 0.062 H 265.9°. Best body text is #FFFFFF at 16.78:1 contrast (WCAG AA passes).

Color values

HEX	#101C3B
RGB	rgb(16, 28, 59)
HSL	hsl(223, 57%, 15%)
HSV	hsv(223, 73%, 23%)
CMYK	cmyk(72.9%, 52.5%, 0%, 76.9%)
CIE-LAB	lab(10.97, 6.86, -21.64)
CIE-LCH	lch(10.97, 22.70, 287.58°)
OKLab	oklab(23.49% -0.0044 -0.0618)
OKLCH	oklch(23.49% 0.062 265.9)
XYZ	xyz(1.4181, 1.2563, 4.3046)
Luminance	0.0126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101C3B #3B2F10

analogous

#10323B #101C3B #1A103B

triadic

#101C3B #3B101C #1C3B10

tetradic

#101C3B #3B1032 #3B2F10 #103B1A

square

#101C3B #3B1032 #3B2F10 #103B1A

split-complementary

#101C3B #3B1A10 #323B10

monochromatic

#070B18 #070B18 #101C3B #1D336B #2A4A9B

Accessibility & contrast

On white

16.78

#101C3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#101C3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101C3B

16.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101C3B	#FFFFFF	#000000	##FFFFFF
##101C3B	1.00	16.78	1.25	16.78
#FFFFFF	16.78	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D1F3C

Deuteranopia (green-blind)

#061C3A

Tritanopia (blue-blind)

#002328

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #101c3b;
/* rgb */ color: rgb(16, 28, 59);
/* oklch */ color: oklch(23.5% 0.062 265.9);

Tailwind

colors: {
  custom: {
    50: '#535771',
    500: '#101c3b',
    950: '#000000',
  },
}

SCSS

$custom: #101c3b;
$custom-light: #535771;
$custom-dark: #000000;

JSON

{
  "hex": "#101c3b",
  "rgb": {
    "r": 16,
    "g": 28,
    "b": 59
  },
  "hsl": {
    "h": 223.256,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.23486,
    "c": 0.06197,
    "h": 265.9
  },
  "luminance": 0.01256
}

Semantic roles & 50–950 ramp

primary

#101C3B

secondary

#756232

accent

#B647E1

background

#F4F5F6

surface

#E8E9EC

border

#C4C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #101C3B

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

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