#1F3B87#1F3B87

#1F3B87 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.9% C 0.132 H 265.3°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#1F3B87
RGB	rgb(31, 59, 135)
HSL	hsl(224, 63%, 33%)
HSV	hsv(224, 77%, 53%)
CMYK	cmyk(77%, 56.3%, 0%, 47.1%)
CIE-LAB	lab(27.21, 18.24, -45.59)
CIE-LCH	lch(27.21, 49.11, 291.80°)
OKLab	oklab(37.91% -0.0109 -0.1314)
OKLCH	oklch(37.91% 0.132 265.3)
XYZ	xyz(6.5007, 5.1678, 23.5719)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3B87 #876B1F

analogous

#1F6F87 #1F3B87 #371F87

triadic

#1F3B87 #871F3B #3B871F

tetradic

#1F3B87 #871F6F #876B1F #1F8737

square

#1F3B87 #871F6F #876B1F #1F8737

split-complementary

#1F3B87 #87371F #6F871F

monochromatic

#080F23 #142555 #1F3B87 #2A51B9 #4B70D6

Accessibility & contrast

On white

10.33

#1F3B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F3B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3B87

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3B87	#FFFFFF	#000000	##FFFFFF
##1F3B87	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458A

Deuteranopia (green-blind)

#003C85

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3b87;
/* rgb */ color: rgb(31, 59, 135);
/* oklch */ color: oklch(37.9% 0.132 265.3);

Tailwind

colors: {
  custom: {
    50: '#6b70ab',
    500: '#1f3b87',
    950: '#000000',
  },
}

SCSS

$custom: #1f3b87;
$custom-light: #6b70ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3b87",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 135
  },
  "hsl": {
    "h": 223.846,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37909,
    "c": 0.13185,
    "h": 265.3
  },
  "luminance": 0.05169
}

Semantic roles & 50–950 ramp

primary

#1F3B87

secondary

#B89A4A

accent

#BA42E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3B87

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

Preview Lab → · Contrast checker → · Palette generator →