#1F4C99#1F4C99

#1F4C99 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.1% C 0.136 H 260.4°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F4C99
RGB	rgb(31, 76, 153)
HSL	hsl(218, 66%, 36%)
HSV	hsv(218, 80%, 60%)
CMYK	cmyk(79.7%, 50.3%, 0%, 40%)
CIE-LAB	lab(33.48, 13.77, -46.49)
CIE-LCH	lch(33.48, 48.49, 286.49°)
OKLab	oklab(43.1% -0.0225 -0.1337)
OKLCH	oklch(43.1% 0.136 260.4)
XYZ	xyz(8.8972, 7.7591, 31.1595)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4C99 #996C1F

analogous

#1F8999 #1F4C99 #2F1F99

triadic

#1F4C99 #991F4C #4C991F

tetradic

#1F4C99 #991F89 #996C1F #1F992F

square

#1F4C99 #991F89 #996C1F #1F992F

split-complementary

#1F4C99 #992F1F #89991F

monochromatic

#0A1933 #153366 #1F4C99 #2965CC #5687DD

Accessibility & contrast

On white

8.23

#1F4C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1F4C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4C99

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4C99	#FFFFFF	#000000	##FFFFFF
##1F4C99	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E559C

Deuteranopia (green-blind)

#004997

Tritanopia (blue-blind)

#005F6B

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4c99;
/* rgb */ color: rgb(31, 76, 153);
/* oklch */ color: oklch(43.1% 0.136 260.4);

Tailwind

colors: {
  custom: {
    50: '#6e7db8',
    500: '#1f4c99',
    950: '#000000',
  },
}

SCSS

$custom: #1f4c99;
$custom-light: #6e7db8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4c99",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 153
  },
  "hsl": {
    "h": 217.869,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43101,
    "c": 0.13561,
    "h": 260.4
  },
  "luminance": 0.0776
}

Semantic roles & 50–950 ramp

primary

#1F4C99

secondary

#C09854

accent

#AA3FE9

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4C99

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

Preview Lab → · Contrast checker → · Palette generator →