#100D3F#100D3F

#100D3F is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.5% C 0.091 H 277.3°. Best body text is #FFFFFF at 18.24:1 contrast (WCAG AA passes).

Color values

HEX	#100D3F
RGB	rgb(16, 13, 63)
HSL	hsl(244, 66%, 15%)
HSV	hsv(244, 79%, 25%)
CMYK	cmyk(74.6%, 79.4%, 0%, 75.3%)
CIE-LAB	lab(6.84, 19.73, -31.19)
CIE-LCH	lch(6.84, 36.91, 302.32°)
OKLab	oklab(20.48% 0.0116 -0.0903)
OKLCH	oklch(20.48% 0.091 277.3)
XYZ	xyz(1.2545, 0.7568, 4.7816)
Luminance	0.0076 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Navy Blue (survey)

#001146

ΔE00 3.16

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#100D3F #3C3F0D

analogous

#0D233F #100D3F #290D3F

triadic

#100D3F #3F100D #0D3F10

tetradic

#100D3F #3F0D23 #3C3F0D #0D3F29

square

#100D3F #3F0D23 #3C3F0D #0D3F29

split-complementary

#100D3F #3F290D #233F0D

monochromatic

#060519 #060519 #100D3F #1D1772 #2A22A4

Accessibility & contrast

On white

18.24

#100D3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#100D3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #100D3F

18.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##100D3F	#FFFFFF	#000000	##FFFFFF
##100D3F	1.00	18.24	1.15	18.24
#FFFFFF	18.24	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001741

Deuteranopia (green-blind)

#00133E

Tritanopia (blue-blind)

#001B24

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #100d3f;
/* rgb */ color: rgb(16, 13, 63);
/* oklch */ color: oklch(20.5% 0.091 277.3);

Tailwind

colors: {
  custom: {
    50: '#564c75',
    500: '#100d3f',
    950: '#000000',
  },
}

SCSS

$custom: #100d3f;
$custom-light: #564c75;
$custom-dark: #000000;

JSON

{
  "hex": "#100d3f",
  "rgb": {
    "r": 16,
    "g": 13,
    "b": 63
  },
  "hsl": {
    "h": 243.6,
    "s": 65.789,
    "l": 14.902
  },
  "oklch": {
    "l": 0.20482,
    "c": 0.09109,
    "h": 277.3
  },
  "luminance": 0.00757
}

Semantic roles & 50–950 ramp

primary

#100D3F

secondary

#767B2D

accent

#E93FDF

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030108

muted

#78777B

Preview Lab

Preview with #100D3F

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

Preview Lab → · Contrast checker → · Palette generator →