#1D3F99#1D3F99

#1D3F99 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.153 H 264.6°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F99
RGB	rgb(29, 63, 153)
HSL	hsl(224, 68%, 36%)
HSV	hsv(224, 81%, 60%)
CMYK	cmyk(81%, 58.8%, 0%, 40%)
CIE-LAB	lab(29.70, 22.43, -52.62)
CIE-LCH	lch(29.70, 57.20, 293.08°)
OKLab	oklab(40.22% -0.0143 -0.152)
OKLCH	oklch(40.22% 0.153 264.6)
XYZ	xyz(8.0319, 6.1152, 30.8878)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F99 #99771D

analogous

#1D7D99 #1D3F99 #391D99

triadic

#1D3F99 #991D3F #3F991D

tetradic

#1D3F99 #991D7D #99771D #1D9939

square

#1D3F99 #991D7D #99771D #1D9939

split-complementary

#1D3F99 #99391D #7D991D

monochromatic

#091532 #132A66 #1D3F99 #2754CC #5279DE

Accessibility & contrast

On white

9.45

#1D3F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1D3F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F99

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F99	#FFFFFF	#000000	##FFFFFF
##1D3F99	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004097

Tritanopia (blue-blind)

#005665

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1d3f99;
/* rgb */ color: rgb(29, 63, 153);
/* oklch */ color: oklch(40.2% 0.153 264.6);

Tailwind

colors: {
  custom: {
    50: '#6f73b8',
    500: '#1d3f99',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f99;
$custom-light: #6f73b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f99",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 223.548,
    "s": 68.132,
    "l": 35.686
  },
  "oklch": {
    "l": 0.40218,
    "c": 0.15268,
    "h": 264.6
  },
  "luminance": 0.06116
}

Semantic roles & 50–950 ramp

primary

#1D3F99

secondary

#C1A251

accent

#BB3DEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #1D3F99

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

Preview Lab → · Contrast checker → · Palette generator →