#1F48A1#1F48A1

#1F48A1 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 42.9% C 0.152 H 263.0°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F48A1
RGB	rgb(31, 72, 161)
HSL	hsl(221, 68%, 38%)
HSV	hsv(221, 81%, 63%)
CMYK	cmyk(80.7%, 55.3%, 0%, 36.9%)
CIE-LAB	lab(32.91, 19.67, -52.23)
CIE-LCH	lch(32.91, 55.81, 290.64°)
OKLab	oklab(42.86% -0.0186 -0.1507)
OKLCH	oklch(42.86% 0.152 263)
XYZ	xyz(9.3132, 7.4981, 34.6677)
Luminance	0.0750 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F48A1 #A1781F

analogous

#1F89A1 #1F48A1 #371FA1

triadic

#1F48A1 #A11F48 #48A11F

tetradic

#1F48A1 #A11F89 #A1781F #1FA137

square

#1F48A1 #A11F89 #A1781F #1FA137

split-complementary

#1F48A1 #A1371F #89A11F

monochromatic

#0B1A3A #15316E #1F48A1 #295FD4 #5B85DF

Accessibility & contrast

On white

8.40

#1F48A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1F48A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F48A1

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F48A1	#FFFFFF	#000000	##FFFFFF
##1F48A1	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054A4

Deuteranopia (green-blind)

#00489F

Tritanopia (blue-blind)

#005E6D

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f48a1;
/* rgb */ color: rgb(31, 72, 161);
/* oklch */ color: oklch(42.9% 0.152 263.0);

Tailwind

colors: {
  custom: {
    50: '#717abd',
    500: '#1f48a1',
    950: '#000000',
  },
}

SCSS

$custom: #1f48a1;
$custom-light: #717abd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f48a1",
  "rgb": {
    "r": 31,
    "g": 72,
    "b": 161
  },
  "hsl": {
    "h": 221.077,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.4286,
    "c": 0.15183,
    "h": 263
  },
  "luminance": 0.07499
}

Semantic roles & 50–950 ramp

primary

#1F48A1

secondary

#C4A258

accent

#B43DEB

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F48A1

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

Preview Lab → · Contrast checker → · Palette generator →