#101D4B#101D4B

#101D4B is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.1% C 0.087 H 267.7°. Best body text is #FFFFFF at 16.16:1 contrast (WCAG AA passes).

Color values

HEX	#101D4B
RGB	rgb(16, 29, 75)
HSL	hsl(227, 65%, 18%)
HSV	hsv(227, 79%, 29%)
CMYK	cmyk(78.7%, 61.3%, 0%, 70.6%)
CIE-LAB	lab(12.59, 13.01, -30.23)
CIE-LCH	lch(12.59, 32.91, 293.29°)
OKLab	oklab(25.13% -0.0035 -0.0871)
OKLCH	oklch(25.13% 0.087 267.7)
XYZ	xyz(1.9226, 1.4967, 6.8428)
Luminance	0.0150 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.63

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101D4B #4B3E10

analogous

#103A4B #101D4B #21104B

triadic

#101D4B #4B101D #1D4B10

tetradic

#101D4B #4B103A #4B3E10 #104B21

square

#101D4B #4B103A #4B3E10 #104B21

split-complementary

#101D4B #4B2110 #3A4B10

monochromatic

#050A19 #050A19 #101D4B #1B317D #2644B0

Accessibility & contrast

On white

16.16

#101D4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#101D4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101D4B

16.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101D4B	#FFFFFF	#000000	##FFFFFF
##101D4B	1.00	16.16	1.30	16.16
#FFFFFF	16.16	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00244D

Deuteranopia (green-blind)

#001E4A

Tritanopia (blue-blind)

#002830

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #101d4b;
/* rgb */ color: rgb(16, 29, 75);
/* oklch */ color: oklch(25.1% 0.087 267.7);

Tailwind

colors: {
  custom: {
    50: '#58587e',
    500: '#101d4b',
    950: '#000000',
  },
}

SCSS

$custom: #101d4b;
$custom-light: #58587e;
$custom-dark: #000000;

JSON

{
  "hex": "#101d4b",
  "rgb": {
    "r": 16,
    "g": 29,
    "b": 75
  },
  "hsl": {
    "h": 226.78,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.25129,
    "c": 0.08713,
    "h": 267.7
  },
  "luminance": 0.01497
}

Semantic roles & 50–950 ramp

primary

#101D4B

secondary

#857332

accent

#C340E8

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #101D4B

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

Preview Lab → · Contrast checker → · Palette generator →