#1F4DA1#1F4DA1

#1F4DA1 is a dark, vivid blue. Relative luminance 0.082; OKLCH L 43.9% C 0.146 H 261.2°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).

Color values

HEX	#1F4DA1
RGB	rgb(31, 77, 161)
HSL	hsl(219, 68%, 38%)
HSV	hsv(219, 81%, 63%)
CMYK	cmyk(80.7%, 52.2%, 0%, 36.9%)
CIE-LAB	lab(34.34, 16.28, -49.93)
CIE-LCH	lch(34.34, 52.52, 288.06°)
OKLab	oklab(43.94% -0.0222 -0.1438)
OKLCH	oklch(43.94% 0.146 261.2)
XYZ	xyz(9.6496, 8.1711, 34.7799)
Luminance	0.0817 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4DA1 #A1731F

analogous

#1F8EA1 #1F4DA1 #321FA1

triadic

#1F4DA1 #A11F4D #4DA11F

tetradic

#1F4DA1 #A11F8E #A1731F #1FA132

square

#1F4DA1 #A11F8E #A1731F #1FA132

split-complementary

#1F4DA1 #A1321F #8EA11F

monochromatic

#0B1C3A #15346E #1F4DA1 #2966D4 #5B8ADF

Accessibility & contrast

On white

7.97

#1F4DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#1F4DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4DA1

7.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4DA1	#FFFFFF	#000000	##FFFFFF
##1F4DA1	1.00	7.97	2.63	7.97
#FFFFFF	7.97	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1457A4

Deuteranopia (green-blind)

#004B9F

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f4da1;
/* rgb */ color: rgb(31, 77, 161);
/* oklch */ color: oklch(43.9% 0.146 261.2);

Tailwind

colors: {
  custom: {
    50: '#707ebd',
    500: '#1f4da1',
    950: '#000000',
  },
}

SCSS

$custom: #1f4da1;
$custom-light: #707ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4da1",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 161
  },
  "hsl": {
    "h": 218.769,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.43941,
    "c": 0.14552,
    "h": 261.2
  },
  "luminance": 0.08172
}

Semantic roles & 50–950 ramp

primary

#1F4DA1

secondary

#C49E58

accent

#AD3DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4DA1

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

Preview Lab → · Contrast checker → · Palette generator →