#1D366B#1D366B

#1D366B is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.4% C 0.098 H 263.2°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#1D366B
RGB	rgb(29, 54, 107)
HSL	hsl(221, 57%, 27%)
HSV	hsv(221, 73%, 42%)
CMYK	cmyk(72.9%, 49.5%, 0%, 58%)
CIE-LAB	lab(23.54, 10.16, -33.81)
CIE-LCH	lch(23.54, 35.30, 286.73°)
OKLab	oklab(34.43% -0.0115 -0.0968)
OKLCH	oklch(34.43% 0.098 263.2)
XYZ	xyz(4.4788, 3.9606, 14.4355)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D366B #6B521D

analogous

#1D5D6B #1D366B #2B1D6B

triadic

#1D366B #6B1D36 #366B1D

tetradic

#1D366B #6B1D5D #6B521D #1D6B2B

square

#1D366B #6B1D5D #6B521D #1D6B2B

split-complementary

#1D366B #6B2B1D #5D6B1D

monochromatic

#070C18 #101E3B #1D366B #2A4E9B #3967C9

Accessibility & contrast

On white

11.72

#1D366B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1D366B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D366B

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D366B	#FFFFFF	#000000	##FFFFFF
##1D366B	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A3C6D

Deuteranopia (green-blind)

#09356A

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1d366b;
/* rgb */ color: rgb(29, 54, 107);
/* oklch */ color: oklch(34.4% 0.098 263.2);

Tailwind

colors: {
  custom: {
    50: '#646c96',
    500: '#1d366b',
    950: '#000000',
  },
}

SCSS

$custom: #1d366b;
$custom-light: #646c96;
$custom-dark: #000000;

JSON

{
  "hex": "#1d366b",
  "rgb": {
    "r": 29,
    "g": 54,
    "b": 107
  },
  "hsl": {
    "h": 220.769,
    "s": 57.353,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34431,
    "c": 0.09753,
    "h": 263.2
  },
  "luminance": 0.03961
}

Semantic roles & 50–950 ramp

primary

#1D366B

secondary

#A08244

accent

#AF47E1

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1D366B

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

Preview Lab → · Contrast checker → · Palette generator →