#1F4388#1F4388

#1F4388 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.8% C 0.123 H 261.8°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F4388
RGB	rgb(31, 67, 136)
HSL	hsl(219, 63%, 33%)
HSV	hsv(219, 77%, 53%)
CMYK	cmyk(77.2%, 50.7%, 0%, 46.7%)
CIE-LAB	lab(29.62, 13.09, -42.31)
CIE-LCH	lch(29.62, 44.29, 287.19°)
OKLab	oklab(39.77% -0.0175 -0.1216)
OKLCH	oklch(39.77% 0.123 261.8)
XYZ	xyz(7.0146, 6.0824, 24.0921)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4388 #88641F

analogous

#1F7788 #1F4388 #301F88

triadic

#1F4388 #881F43 #43881F

tetradic

#1F4388 #881F77 #88641F #1F8830

square

#1F4388 #881F77 #88641F #1F8830

split-complementary

#1F4388 #88301F #77881F

monochromatic

#081224 #142A56 #1F4388 #2A5CBA #4B7BD6

Accessibility & contrast

On white

9.47

#1F4388 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F4388 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4388

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4388	#FFFFFF	#000000	##FFFFFF
##1F4388	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4B8B

Deuteranopia (green-blind)

#004187

Tritanopia (blue-blind)

#00535F

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f4388;
/* rgb */ color: rgb(31, 67, 136);
/* oklch */ color: oklch(39.8% 0.123 261.8);

Tailwind

colors: {
  custom: {
    50: '#6b76ab',
    500: '#1f4388',
    950: '#000000',
  },
}

SCSS

$custom: #1f4388;
$custom-light: #6b76ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4388",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 136
  },
  "hsl": {
    "h": 219.429,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39765,
    "c": 0.12285,
    "h": 261.8
  },
  "luminance": 0.06083
}

Semantic roles & 50–950 ramp

primary

#1F4388

secondary

#B9934A

accent

#AE42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1F4388

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

Preview Lab → · Contrast checker → · Palette generator →