#1F4B99#1F4B99

#1F4B99 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 42.9% C 0.137 H 260.9°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B99
RGB	rgb(31, 75, 153)
HSL	hsl(218, 66%, 36%)
HSV	hsv(218, 80%, 60%)
CMYK	cmyk(79.7%, 51%, 0%, 40%)
CIE-LAB	lab(33.18, 14.44, -46.97)
CIE-LCH	lch(33.18, 49.14, 287.10°)
OKLab	oklab(42.88% -0.0217 -0.1351)
OKLCH	oklch(42.88% 0.137 260.9)
XYZ	xyz(8.8288, 7.6223, 31.1368)
Luminance	0.0762 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B99 #996D1F

analogous

#1F8899 #1F4B99 #301F99

triadic

#1F4B99 #991F4B #4B991F

tetradic

#1F4B99 #991F88 #996D1F #1F9930

square

#1F4B99 #991F88 #996D1F #1F9930

split-complementary

#1F4B99 #99301F #88991F

monochromatic

#0A1933 #153266 #1F4B99 #2964CC #5686DD

Accessibility & contrast

On white

8.32

#1F4B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1F4B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B99

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B99	#FFFFFF	#000000	##FFFFFF
##1F4B99	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B549C

Deuteranopia (green-blind)

#004997

Tritanopia (blue-blind)

#005E6A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f4b99;
/* rgb */ color: rgb(31, 75, 153);
/* oklch */ color: oklch(42.9% 0.137 260.9);

Tailwind

colors: {
  custom: {
    50: '#6e7cb8',
    500: '#1f4b99',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b99;
$custom-light: #6e7cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b99",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 153
  },
  "hsl": {
    "h": 218.361,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.42877,
    "c": 0.13687,
    "h": 260.9
  },
  "luminance": 0.07623
}

Semantic roles & 50–950 ramp

primary

#1F4B99

secondary

#C09954

accent

#AC3FE9

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4B99

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

Preview Lab → · Contrast checker → · Palette generator →