#1F3D8F#1F3D8F

#1F3D8F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.0% C 0.141 H 265.2°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D8F
RGB	rgb(31, 61, 143)
HSL	hsl(224, 64%, 34%)
HSV	hsv(224, 78%, 56%)
CMYK	cmyk(78.3%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(28.41, 20.04, -48.59)
CIE-LCH	lch(28.41, 52.56, 292.41°)
OKLab	oklab(39.01% -0.0119 -0.1402)
OKLCH	oklch(39.01% 0.141 265.2)
XYZ	xyz(7.1900, 5.6112, 26.6854)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D8F #8F711F

analogous

#1F758F #1F3D8F #391F8F

triadic

#1F3D8F #8F1F3D #3D8F1F

tetradic

#1F3D8F #8F1F75 #8F711F #1F8F39

square

#1F3D8F #8F1F75 #8F711F #1F8F39

split-complementary

#1F3D8F #8F391F #758F1F

monochromatic

#09122A #14285D #1F3D8F #2A52C1 #4F74D9

Accessibility & contrast

On white

9.89

#1F3D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1F3D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D8F

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D8F	#FFFFFF	#000000	##FFFFFF
##1F3D8F	1.00	9.89	2.12	9.89
#FFFFFF	9.89	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3d8f;
/* rgb */ color: rgb(31, 61, 143);
/* oklch */ color: oklch(39.0% 0.141 265.2);

Tailwind

colors: {
  custom: {
    50: '#6d72b0',
    500: '#1f3d8f',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d8f;
$custom-light: #6d72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d8f",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 223.929,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.39014,
    "c": 0.14068,
    "h": 265.2
  },
  "luminance": 0.05612
}

Semantic roles & 50–950 ramp

primary

#1F3D8F

secondary

#BC9E4E

accent

#BB40E7

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3D8F

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

Preview Lab → · Contrast checker → · Palette generator →