#1F4289#1F4289

#1F4289 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.6% C 0.126 H 262.5°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F4289
RGB	rgb(31, 66, 137)
HSL	hsl(220, 63%, 33%)
HSV	hsv(220, 77%, 54%)
CMYK	cmyk(77.4%, 51.8%, 0%, 46.3%)
CIE-LAB	lab(29.39, 14.18, -43.29)
CIE-LCH	lch(29.39, 45.56, 288.14°)
OKLab	oklab(39.62% -0.0165 -0.1245)
OKLCH	oklch(39.62% 0.126 262.5)
XYZ	xyz(7.0270, 5.9931, 24.4485)
Luminance	0.0599 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4289 #89661F

analogous

#1F7789 #1F4289 #311F89

triadic

#1F4289 #891F42 #42891F

tetradic

#1F4289 #891F77 #89661F #1F8931

square

#1F4289 #891F77 #89661F #1F8931

split-complementary

#1F4289 #89311F #77891F

monochromatic

#081225 #142A57 #1F4289 #2A5ABB #4C7AD6

Accessibility & contrast

On white

9.55

#1F4289 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1F4289 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4289

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4289	#FFFFFF	#000000	##FFFFFF
##1F4289	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164A8C

Deuteranopia (green-blind)

#004188

Tritanopia (blue-blind)

#00535F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f4289;
/* rgb */ color: rgb(31, 66, 137);
/* oklch */ color: oklch(39.6% 0.126 262.5);

Tailwind

colors: {
  custom: {
    50: '#6b75ac',
    500: '#1f4289',
    950: '#000000',
  },
}

SCSS

$custom: #1f4289;
$custom-light: #6b75ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4289",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 137
  },
  "hsl": {
    "h": 220.189,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.39617,
    "c": 0.12559,
    "h": 262.5
  },
  "luminance": 0.05994
}

Semantic roles & 50–950 ramp

primary

#1F4289

secondary

#B9954B

accent

#B042E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F4289

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

Preview Lab → · Contrast checker → · Palette generator →