#1F4CA1#1F4CA1

#1F4CA1 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.7% C 0.147 H 261.6°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#1F4CA1
RGB	rgb(31, 76, 161)
HSL	hsl(219, 68%, 38%)
HSV	hsv(219, 81%, 63%)
CMYK	cmyk(80.7%, 52.8%, 0%, 36.9%)
CIE-LAB	lab(34.05, 16.96, -50.39)
CIE-LCH	lch(34.05, 53.17, 288.60°)
OKLab	oklab(43.72% -0.0215 -0.1452)
OKLCH	oklch(43.72% 0.147 261.6)
XYZ	xyz(9.5802, 8.0323, 34.7568)
Luminance	0.0803 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4CA1 #A1741F

analogous

#1F8DA1 #1F4CA1 #331FA1

triadic

#1F4CA1 #A11F4C #4CA11F

tetradic

#1F4CA1 #A11F8D #A1741F #1FA133

square

#1F4CA1 #A11F8D #A1741F #1FA133

split-complementary

#1F4CA1 #A1331F #8DA11F

monochromatic

#0B1C3A #15346E #1F4CA1 #2964D4 #5B89DF

Accessibility & contrast

On white

8.06

#1F4CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1F4CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4CA1

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4CA1	#FFFFFF	#000000	##FFFFFF
##1F4CA1	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1056A4

Deuteranopia (green-blind)

#004A9F

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4ca1;
/* rgb */ color: rgb(31, 76, 161);
/* oklch */ color: oklch(43.7% 0.147 261.6);

Tailwind

colors: {
  custom: {
    50: '#707dbd',
    500: '#1f4ca1',
    950: '#000000',
  },
}

SCSS

$custom: #1f4ca1;
$custom-light: #707dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4ca1",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 161
  },
  "hsl": {
    "h": 219.231,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.43722,
    "c": 0.14678,
    "h": 261.6
  },
  "luminance": 0.08033
}

Semantic roles & 50–950 ramp

primary

#1F4CA1

secondary

#C49E58

accent

#AF3DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4CA1

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

Preview Lab → · Contrast checker → · Palette generator →