#1F48A4#1F48A4

#1F48A4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.1% C 0.156 H 263.3°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#1F48A4
RGB	rgb(31, 72, 164)
HSL	hsl(222, 68%, 38%)
HSV	hsv(222, 81%, 64%)
CMYK	cmyk(81.1%, 56.1%, 0%, 35.7%)
CIE-LAB	lab(33.15, 20.86, -53.66)
CIE-LCH	lch(33.15, 57.57, 291.24°)
OKLab	oklab(43.11% -0.0183 -0.1549)
OKLCH	oklch(43.11% 0.156 263.3)
XYZ	xyz(9.5809, 7.6052, 36.0778)
Luminance	0.0761 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F48A4 #A47B1F

analogous

#1F8AA4 #1F48A4 #391FA4

triadic

#1F48A4 #A41F48 #48A41F

tetradic

#1F48A4 #A41F8A #A47B1F #1FA439

square

#1F48A4 #A41F8A #A47B1F #1FA439

split-complementary

#1F48A4 #A4391F #8AA41F

monochromatic

#0C1B3D #153171 #1F48A4 #2A5FD7 #5D86E0

Accessibility & contrast

On white

8.33

#1F48A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1F48A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F48A4

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F48A4	#FFFFFF	#000000	##FFFFFF
##1F48A4	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054A7

Deuteranopia (green-blind)

#0048A2

Tritanopia (blue-blind)

#005F6F

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f48a4;
/* rgb */ color: rgb(31, 72, 164);
/* oklch */ color: oklch(43.1% 0.156 263.3);

Tailwind

colors: {
  custom: {
    50: '#717ac0',
    500: '#1f48a4',
    950: '#000000',
  },
}

SCSS

$custom: #1f48a4;
$custom-light: #717ac0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f48a4",
  "rgb": {
    "r": 31,
    "g": 72,
    "b": 164
  },
  "hsl": {
    "h": 221.504,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.43109,
    "c": 0.15596,
    "h": 263.3
  },
  "luminance": 0.07606
}

Semantic roles & 50–950 ramp

primary

#1F48A4

secondary

#C5A45A

accent

#B53DEB

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F48A4

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

Preview Lab → · Contrast checker → · Palette generator →