#1F4AA4#1F4AA4

#1F4AA4 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.5% C 0.153 H 262.6°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#1F4AA4
RGB	rgb(31, 74, 164)
HSL	hsl(221, 68%, 38%)
HSV	hsv(221, 81%, 64%)
CMYK	cmyk(81.1%, 54.9%, 0%, 35.7%)
CIE-LAB	lab(33.71, 19.50, -52.75)
CIE-LCH	lch(33.71, 56.24, 290.29°)
OKLab	oklab(43.53% -0.0197 -0.1522)
OKLCH	oklch(43.53% 0.153 262.6)
XYZ	xyz(9.7123, 7.8680, 36.1216)
Luminance	0.0787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4AA4 #A4791F

analogous

#1F8CA4 #1F4AA4 #371FA4

triadic

#1F4AA4 #A41F4A #4AA41F

tetradic

#1F4AA4 #A41F8C #A4791F #1FA437

square

#1F4AA4 #A41F8C #A4791F #1FA437

split-complementary

#1F4AA4 #A4371F #8CA41F

monochromatic

#0C1C3D #153371 #1F4AA4 #2A62D7 #5D87E0

Accessibility & contrast

On white

8.16

#1F4AA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#1F4AA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4AA4

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4AA4	#FFFFFF	#000000	##FFFFFF
##1F4AA4	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056A7

Deuteranopia (green-blind)

#0049A2

Tritanopia (blue-blind)

#00606F

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4aa4;
/* rgb */ color: rgb(31, 74, 164);
/* oklch */ color: oklch(43.5% 0.153 262.6);

Tailwind

colors: {
  custom: {
    50: '#717bc0',
    500: '#1f4aa4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4aa4;
$custom-light: #717bc0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4aa4",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 164
  },
  "hsl": {
    "h": 220.602,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.43532,
    "c": 0.15344,
    "h": 262.6
  },
  "luminance": 0.07869
}

Semantic roles & 50–950 ramp

primary

#1F4AA4

secondary

#C5A25A

accent

#B33DEB

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4AA4

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

Preview Lab → · Contrast checker → · Palette generator →