#1F4A99#1F4A99

#1F4A99 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 42.7% C 0.138 H 261.3°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A99
RGB	rgb(31, 74, 153)
HSL	hsl(219, 66%, 36%)
HSV	hsv(219, 80%, 60%)
CMYK	cmyk(79.7%, 51.6%, 0%, 40%)
CIE-LAB	lab(32.89, 15.12, -47.44)
CIE-LCH	lch(32.89, 49.79, 287.68°)
OKLab	oklab(42.66% -0.0209 -0.1365)
OKLCH	oklch(42.66% 0.138 261.3)
XYZ	xyz(8.7615, 7.4877, 31.1143)
Luminance	0.0749 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A99 #996E1F

analogous

#1F8799 #1F4A99 #311F99

triadic

#1F4A99 #991F4A #4A991F

tetradic

#1F4A99 #991F87 #996E1F #1F9931

square

#1F4A99 #991F87 #996E1F #1F9931

split-complementary

#1F4A99 #99311F #87991F

monochromatic

#0A1933 #153166 #1F4A99 #2963CC #5685DD

Accessibility & contrast

On white

8.41

#1F4A99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1F4A99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A99

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A99	#FFFFFF	#000000	##FFFFFF
##1F4A99	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18539C

Deuteranopia (green-blind)

#004897

Tritanopia (blue-blind)

#005D6A

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f4a99;
/* rgb */ color: rgb(31, 74, 153);
/* oklch */ color: oklch(42.7% 0.138 261.3);

Tailwind

colors: {
  custom: {
    50: '#6f7bb8',
    500: '#1f4a99',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a99;
$custom-light: #6f7bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a99",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 153
  },
  "hsl": {
    "h": 218.852,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.42655,
    "c": 0.13814,
    "h": 261.3
  },
  "luminance": 0.07489
}

Semantic roles & 50–950 ramp

primary

#1F4A99

secondary

#C09A54

accent

#AD3FE9

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4A99

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

Preview Lab → · Contrast checker → · Palette generator →