#1D3F9A#1D3F9A

#1D3F9A is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.154 H 264.7°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F9A
RGB	rgb(29, 63, 154)
HSL	hsl(224, 68%, 36%)
HSV	hsv(224, 81%, 60%)
CMYK	cmyk(81.2%, 59.1%, 0%, 39.6%)
CIE-LAB	lab(29.78, 22.82, -53.09)
CIE-LCH	lch(29.78, 57.79, 293.26°)
OKLab	oklab(40.31% -0.0143 -0.1534)
OKLCH	oklch(40.31% 0.154 264.7)
XYZ	xyz(8.1149, 6.1484, 31.3246)
Luminance	0.0615 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F9A #9A781D

analogous

#1D7D9A #1D3F9A #391D9A

triadic

#1D3F9A #9A1D3F #3F9A1D

tetradic

#1D3F9A #9A1D7D #9A781D #1D9A39

square

#1D3F9A #9A1D7D #9A781D #1D9A39

split-complementary

#1D3F9A #9A391D #7D9A1D

monochromatic

#0A1533 #132A66 #1D3F9A #2754CE #5379DF

Accessibility & contrast

On white

9.42

#1D3F9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1D3F9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F9A

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F9A	#FFFFFF	#000000	##FFFFFF
##1D3F9A	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9D

Deuteranopia (green-blind)

#004198

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1d3f9a;
/* rgb */ color: rgb(29, 63, 154);
/* oklch */ color: oklch(40.3% 0.154 264.7);

Tailwind

colors: {
  custom: {
    50: '#6f73b9',
    500: '#1d3f9a',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f9a;
$custom-light: #6f73b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f9a",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 154
  },
  "hsl": {
    "h": 223.68,
    "s": 68.306,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40306,
    "c": 0.15406,
    "h": 264.7
  },
  "luminance": 0.06149
}

Semantic roles & 50–950 ramp

primary

#1D3F9A

secondary

#C2A351

accent

#BC3DEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #1D3F9A

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

Preview Lab → · Contrast checker → · Palette generator →