#1D3F73#1D3F73

#1D3F73 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.2% C 0.098 H 258.8°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F73
RGB	rgb(29, 63, 115)
HSL	hsl(216, 60%, 28%)
HSV	hsv(216, 75%, 45%)
CMYK	cmyk(74.8%, 45.2%, 0%, 54.9%)
CIE-LAB	lab(26.89, 7.09, -33.56)
CIE-LCH	lch(26.89, 34.30, 281.93°)
OKLab	oklab(37.18% -0.0191 -0.096)
OKLCH	oklch(37.18% 0.098 258.8)
XYZ	xyz(5.3776, 5.0535, 16.9083)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F73 #73511D

analogous

#1D6A73 #1D3F73 #261D73

triadic

#1D3F73 #731D3F #3F731D

tetradic

#1D3F73 #731D6A #73511D #1D7326

square

#1D3F73 #731D6A #73511D #1D7326

split-complementary

#1D3F73 #73261D #6A731D

monochromatic

#060D18 #112442 #1D3F73 #295AA4 #3C76CE

Accessibility & contrast

On white

10.44

#1D3F73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1D3F73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F73

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F73	#FFFFFF	#000000	##FFFFFF
##1D3F73	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#264475

Deuteranopia (green-blind)

#163C72

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1d3f73;
/* rgb */ color: rgb(29, 63, 115);
/* oklch */ color: oklch(37.2% 0.098 258.8);

Tailwind

colors: {
  custom: {
    50: '#65739c',
    500: '#1d3f73',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f73;
$custom-light: #65739c;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f73",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 115
  },
  "hsl": {
    "h": 216.279,
    "s": 59.722,
    "l": 28.235
  },
  "oklch": {
    "l": 0.37181,
    "c": 0.09784,
    "h": 258.8
  },
  "luminance": 0.05054
}

Semantic roles & 50–950 ramp

primary

#1D3F73

secondary

#A78045

accent

#A445E3

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1D3F73

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

Preview Lab → · Contrast checker → · Palette generator →