#1F3D87#1F3D87

#1F3D87 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.3% C 0.129 H 264.4°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D87
RGB	rgb(31, 61, 135)
HSL	hsl(223, 63%, 33%)
HSV	hsv(223, 77%, 53%)
CMYK	cmyk(77%, 54.8%, 0%, 47.1%)
CIE-LAB	lab(27.78, 16.85, -44.66)
CIE-LCH	lch(27.78, 47.73, 290.67°)
OKLab	oklab(38.34% -0.0125 -0.1286)
OKLCH	oklch(38.34% 0.129 264.4)
XYZ	xyz(6.6054, 5.3773, 23.6068)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D87 #87691F

analogous

#1F7187 #1F3D87 #351F87

triadic

#1F3D87 #871F3D #3D871F

tetradic

#1F3D87 #871F71 #87691F #1F8735

square

#1F3D87 #871F71 #87691F #1F8735

split-complementary

#1F3D87 #87351F #71871F

monochromatic

#081023 #142755 #1F3D87 #2A53B9 #4B73D6

Accessibility & contrast

On white

10.12

#1F3D87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1F3D87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D87

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D87	#FFFFFF	#000000	##FFFFFF
##1F3D87	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05478A

Deuteranopia (green-blind)

#003D86

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3d87;
/* rgb */ color: rgb(31, 61, 135);
/* oklch */ color: oklch(38.3% 0.129 264.4);

Tailwind

colors: {
  custom: {
    50: '#6b72ab',
    500: '#1f3d87',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d87;
$custom-light: #6b72ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d87",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 135
  },
  "hsl": {
    "h": 222.692,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38344,
    "c": 0.12923,
    "h": 264.4
  },
  "luminance": 0.05378
}

Semantic roles & 50–950 ramp

primary

#1F3D87

secondary

#B8984A

accent

#B742E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3D87

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

Preview Lab → · Contrast checker → · Palette generator →