#1F48B2#1F48B2

#1F48B2 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.3% C 0.175 H 264.3°. Best body text is #FFFFFF at 7.99:1 contrast (WCAG AA passes).

Color values

HEX	#1F48B2
RGB	rgb(31, 72, 178)
HSL	hsl(223, 70%, 41%)
HSV	hsv(223, 83%, 70%)
CMYK	cmyk(82.6%, 59.6%, 0%, 30.2%)
CIE-LAB	lab(34.27, 26.35, -60.18)
CIE-LCH	lch(34.27, 65.70, 293.65°)
OKLab	oklab(44.31% -0.0175 -0.174)
OKLCH	oklch(44.31% 0.175 264.3)
XYZ	xyz(10.9155, 8.1391, 43.1065)
Luminance	0.0814 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F48B2 #B2891F

analogous

#1F91B2 #1F48B2 #3F1FB2

triadic

#1F48B2 #B21F48 #48B21F

tetradic

#1F48B2 #B21F91 #B2891F #1FB23F

square

#1F48B2 #B21F91 #B2891F #1FB23F

split-complementary

#1F48B2 #B23F1F #91B21F

monochromatic

#0D1E4A #16337E #1F48B2 #3362DB #678AE5

Accessibility & contrast

On white

7.99

#1F48B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#1F48B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F48B2

7.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F48B2	#FFFFFF	#000000	##FFFFFF
##1F48B2	1.00	7.99	2.63	7.99
#FFFFFF	7.99	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B6

Deuteranopia (green-blind)

#004AB0

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f48b2;
/* rgb */ color: rgb(31, 72, 178);
/* oklch */ color: oklch(44.3% 0.175 264.3);

Tailwind

colors: {
  custom: {
    50: '#757aca',
    500: '#1f48b2',
    950: '#000000',
  },
}

SCSS

$custom: #1f48b2;
$custom-light: #757aca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f48b2",
  "rgb": {
    "r": 31,
    "g": 72,
    "b": 178
  },
  "hsl": {
    "h": 223.265,
    "s": 70.335,
    "l": 40.98
  },
  "oklch": {
    "l": 0.44305,
    "c": 0.17491,
    "h": 264.3
  },
  "luminance": 0.0814
}

Semantic roles & 50–950 ramp

primary

#1F48B2

secondary

#CAAD63

accent

#BB3BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F48B2

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

Preview Lab → · Contrast checker → · Palette generator →