#1D3FA1#1D3FA1

#1D3FA1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.9% C 0.164 H 265.1°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#1D3FA1
RGB	rgb(29, 63, 161)
HSL	hsl(225, 69%, 37%)
HSV	hsv(225, 82%, 63%)
CMYK	cmyk(82%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(30.37, 25.59, -56.38)
CIE-LCH	lch(30.37, 61.91, 294.41°)
OKLab	oklab(40.93% -0.014 -0.163)
OKLCH	oklch(40.93% 0.164 265.1)
XYZ	xyz(8.7149, 6.3884, 34.4851)
Luminance	0.0639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3FA1 #A17F1D

analogous

#1D81A1 #1D3FA1 #3D1DA1

triadic

#1D3FA1 #A11D3F #3FA11D

tetradic

#1D3FA1 #A11D81 #A17F1D #1DA13D

square

#1D3FA1 #A11D81 #A17F1D #1DA13D

split-complementary

#1D3FA1 #A13D1D #81A11D

monochromatic

#0A1639 #142B6D #1D3FA1 #2653D5 #587BE1

Accessibility & contrast

On white

9.22

#1D3FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1D3FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3FA1

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3FA1	#FFFFFF	#000000	##FFFFFF
##1D3FA1	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00429F

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1d3fa1;
/* rgb */ color: rgb(29, 63, 161);
/* oklch */ color: oklch(40.9% 0.164 265.1);

Tailwind

colors: {
  custom: {
    50: '#7173be',
    500: '#1d3fa1',
    950: '#000000',
  },
}

SCSS

$custom: #1d3fa1;
$custom-light: #7173be;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3fa1",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 224.545,
    "s": 69.474,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40929,
    "c": 0.16364,
    "h": 265.1
  },
  "luminance": 0.06389
}

Semantic roles & 50–950 ramp

primary

#1D3FA1

secondary

#C4A855

accent

#BF3CEC

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D3FA1

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

Preview Lab → · Contrast checker → · Palette generator →