#1F3987#1F3987

#1F3987 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.134 H 266.0°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F3987
RGB	rgb(31, 57, 135)
HSL	hsl(225, 63%, 33%)
HSV	hsv(225, 77%, 53%)
CMYK	cmyk(77%, 57.8%, 0%, 47.1%)
CIE-LAB	lab(26.64, 19.63, -46.52)
CIE-LCH	lch(26.64, 50.49, 292.88°)
OKLab	oklab(37.48% -0.0093 -0.1342)
OKLCH	oklch(37.48% 0.134 266)
XYZ	xyz(6.3998, 4.9661, 23.5382)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3987 #876D1F

analogous

#1F6D87 #1F3987 #391F87

triadic

#1F3987 #871F39 #39871F

tetradic

#1F3987 #871F6D #876D1F #1F8739

square

#1F3987 #871F6D #876D1F #1F8739

split-complementary

#1F3987 #87391F #6D871F

monochromatic

#080F23 #142455 #1F3987 #2A4EB9 #4B6DD6

Accessibility & contrast

On white

10.53

#1F3987 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1F3987 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3987

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3987	#FFFFFF	#000000	##FFFFFF
##1F3987	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448A

Deuteranopia (green-blind)

#003A85

Tritanopia (blue-blind)

#004C5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3987;
/* rgb */ color: rgb(31, 57, 135);
/* oklch */ color: oklch(37.5% 0.134 266.0);

Tailwind

colors: {
  custom: {
    50: '#6b6eab',
    500: '#1f3987',
    950: '#000000',
  },
}

SCSS

$custom: #1f3987;
$custom-light: #6b6eab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3987",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 135
  },
  "hsl": {
    "h": 225,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37479,
    "c": 0.13448,
    "h": 266
  },
  "luminance": 0.04967
}

Semantic roles & 50–950 ramp

primary

#1F3987

secondary

#B89D4A

accent

#BD42E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3987

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

Preview Lab → · Contrast checker → · Palette generator →