#1F4F99#1F4F99

#1F4F99 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 43.8% C 0.132 H 259.1°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F4F99
RGB	rgb(31, 79, 153)
HSL	hsl(216, 66%, 36%)
HSV	hsv(216, 80%, 60%)
CMYK	cmyk(79.7%, 48.4%, 0%, 40%)
CIE-LAB	lab(34.36, 11.74, -45.07)
CIE-LCH	lch(34.36, 46.58, 284.61°)
OKLab	oklab(43.78% -0.025 -0.1295)
OKLCH	oklch(43.78% 0.132 259.1)
XYZ	xyz(9.1087, 8.1821, 31.2301)
Luminance	0.0818 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4F99 #99691F

analogous

#1F8C99 #1F4F99 #2C1F99

triadic

#1F4F99 #991F4F #4F991F

tetradic

#1F4F99 #991F8C #99691F #1F992C

square

#1F4F99 #991F8C #99691F #1F992C

split-complementary

#1F4F99 #992C1F #8C991F

monochromatic

#0A1A33 #153566 #1F4F99 #2969CC #568BDD

Accessibility & contrast

On white

7.96

#1F4F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1F4F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4F99

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4F99	#FFFFFF	#000000	##FFFFFF
##1F4F99	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26579C

Deuteranopia (green-blind)

#004C98

Tritanopia (blue-blind)

#00616C

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f4f99;
/* rgb */ color: rgb(31, 79, 153);
/* oklch */ color: oklch(43.8% 0.132 259.1);

Tailwind

colors: {
  custom: {
    50: '#6e7fb7',
    500: '#1f4f99',
    950: '#000000',
  },
}

SCSS

$custom: #1f4f99;
$custom-light: #6e7fb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4f99",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 153
  },
  "hsl": {
    "h": 216.393,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43779,
    "c": 0.13186,
    "h": 259.1
  },
  "luminance": 0.08183
}

Semantic roles & 50–950 ramp

primary

#1F4F99

secondary

#C09554

accent

#A63FE9

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F4F99

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

Preview Lab → · Contrast checker → · Palette generator →