#1F4DA4#1F4DA4

#1F4DA4 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.2% C 0.150 H 261.6°. Best body text is #FFFFFF at 7.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F4DA4
RGB	rgb(31, 77, 164)
HSL	hsl(219, 68%, 38%)
HSV	hsv(219, 81%, 64%)
CMYK	cmyk(81.1%, 53%, 0%, 35.7%)
CIE-LAB	lab(34.56, 17.48, -51.37)
CIE-LCH	lch(34.56, 54.27, 288.79°)
OKLab	oklab(44.18% -0.0219 -0.1481)
OKLCH	oklch(44.18% 0.15 261.6)
XYZ	xyz(9.9174, 8.2782, 36.1899)
Luminance	0.0828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4DA4 #A4761F

analogous

#1F8FA4 #1F4DA4 #331FA4

triadic

#1F4DA4 #A41F4D #4DA41F

tetradic

#1F4DA4 #A41F8F #A4761F #1FA433

square

#1F4DA4 #A41F8F #A4761F #1FA433

split-complementary

#1F4DA4 #A4331F #8FA41F

monochromatic

#0C1D3D #153571 #1F4DA4 #2A65D7 #5D8AE0

Accessibility & contrast

On white

7.91

#1F4DA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#1F4DA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4DA4

7.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4DA4	#FFFFFF	#000000	##FFFFFF
##1F4DA4	1.00	7.91	2.66	7.91
#FFFFFF	7.91	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D58A7

Deuteranopia (green-blind)

#004CA2

Tritanopia (blue-blind)

#006271

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f4da4;
/* rgb */ color: rgb(31, 77, 164);
/* oklch */ color: oklch(44.2% 0.150 261.6);

Tailwind

colors: {
  custom: {
    50: '#717ec0',
    500: '#1f4da4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4da4;
$custom-light: #717ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4da4",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 164
  },
  "hsl": {
    "h": 219.248,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.44177,
    "c": 0.14967,
    "h": 261.6
  },
  "luminance": 0.08279
}

Semantic roles & 50–950 ramp

primary

#1F4DA4

secondary

#C5A05A

accent

#AF3DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4DA4

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

Preview Lab → · Contrast checker → · Palette generator →