#1F4399#1F4399

#1F4399 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.1% C 0.147 H 263.9°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F4399
RGB	rgb(31, 67, 153)
HSL	hsl(222, 66%, 36%)
HSV	hsv(222, 80%, 60%)
CMYK	cmyk(79.7%, 56.2%, 0%, 40%)
CIE-LAB	lab(30.89, 19.90, -50.68)
CIE-LCH	lch(30.89, 54.45, 291.43°)
OKLab	oklab(41.13% -0.0156 -0.1462)
OKLCH	oklch(41.13% 0.147 263.9)
XYZ	xyz(8.3200, 6.6046, 30.9671)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4399 #99751F

analogous

#1F8099 #1F4399 #381F99

triadic

#1F4399 #991F43 #43991F

tetradic

#1F4399 #991F80 #99751F #1F9938

square

#1F4399 #991F80 #99751F #1F9938

split-complementary

#1F4399 #99381F #80991F

monochromatic

#0A1633 #152D66 #1F4399 #2959CC #567EDD

Accessibility & contrast

On white

9.05

#1F4399 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1F4399 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4399

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4399	#FFFFFF	#000000	##FFFFFF
##1F4399	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9C

Deuteranopia (green-blind)

#004397

Tritanopia (blue-blind)

#005867

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f4399;
/* rgb */ color: rgb(31, 67, 153);
/* oklch */ color: oklch(41.1% 0.147 263.9);

Tailwind

colors: {
  custom: {
    50: '#6f76b8',
    500: '#1f4399',
    950: '#000000',
  },
}

SCSS

$custom: #1f4399;
$custom-light: #6f76b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4399",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 153
  },
  "hsl": {
    "h": 222.295,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.41133,
    "c": 0.14705,
    "h": 263.9
  },
  "luminance": 0.06606
}

Semantic roles & 50–950 ramp

primary

#1F4399

secondary

#C0A054

accent

#B73FE9

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #1F4399

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

Preview Lab → · Contrast checker → · Palette generator →