#1F48B4#1F48B4

#1F48B4 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.5% C 0.178 H 264.4°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F48B4
RGB	rgb(31, 72, 180)
HSL	hsl(223, 71%, 41%)
HSV	hsv(223, 83%, 71%)
CMYK	cmyk(82.8%, 60%, 0%, 29.4%)
CIE-LAB	lab(34.44, 27.13, -61.10)
CIE-LCH	lch(34.44, 66.85, 293.94°)
OKLab	oklab(44.48% -0.0174 -0.1767)
OKLCH	oklch(44.48% 0.178 264.4)
XYZ	xyz(11.1177, 8.2200, 44.1718)
Luminance	0.0822 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F48B4 #B48B1F

analogous

#1F93B4 #1F48B4 #411FB4

triadic

#1F48B4 #B41F48 #48B41F

tetradic

#1F48B4 #B41F93 #B48B1F #1FB441

square

#1F48B4 #B41F93 #B48B1F #1FB441

split-complementary

#1F48B4 #B4411F #93B41F

monochromatic

#0D1E4C #163380 #1F48B4 #3462DC #688BE5

Accessibility & contrast

On white

7.94

#1F48B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1F48B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F48B4

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F48B4	#FFFFFF	#000000	##FFFFFF
##1F48B4	1.00	7.94	2.64	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B8

Deuteranopia (green-blind)

#004AB2

Tritanopia (blue-blind)

#006477

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f48b4;
/* rgb */ color: rgb(31, 72, 180);
/* oklch */ color: oklch(44.5% 0.178 264.4);

Tailwind

colors: {
  custom: {
    50: '#767acb',
    500: '#1f48b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f48b4;
$custom-light: #767acb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f48b4",
  "rgb": {
    "r": 31,
    "g": 72,
    "b": 180
  },
  "hsl": {
    "h": 223.49,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.44481,
    "c": 0.17757,
    "h": 264.4
  },
  "luminance": 0.08221
}

Semantic roles & 50–950 ramp

primary

#1F48B4

secondary

#CBAE64

accent

#BC3AED

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F48B4

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

Preview Lab → · Contrast checker → · Palette generator →