#1F4FA7#1F4FA7

#1F4FA7 is a dark, vivid blue. Relative luminance 0.087; OKLCH L 44.8% C 0.151 H 261.3°. Best body text is #FFFFFF at 7.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FA7
RGB	rgb(31, 79, 167)
HSL	hsl(219, 69%, 39%)
HSV	hsv(219, 81%, 65%)
CMYK	cmyk(81.4%, 52.7%, 0%, 34.5%)
CIE-LAB	lab(35.35, 17.32, -51.89)
CIE-LCH	lch(35.35, 54.71, 288.46°)
OKLab	oklab(44.85% -0.023 -0.1495)
OKLCH	oklch(44.85% 0.151 261.3)
XYZ	xyz(10.3336, 8.6721, 37.6810)
Luminance	0.0867 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FA7 #A7771F

analogous

#1F93A7 #1F4FA7 #331FA7

triadic

#1F4FA7 #A71F4F #4FA71F

tetradic

#1F4FA7 #A71F93 #A7771F #1FA733

square

#1F4FA7 #A71F93 #A7771F #1FA733

split-complementary

#1F4FA7 #A7331F #93A71F

monochromatic

#0C1E40 #153773 #1F4FA7 #2B68D8 #5F8DE1

Accessibility & contrast

On white

7.68

#1F4FA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#1F4FA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FA7

7.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FA7	#FFFFFF	#000000	##FFFFFF
##1F4FA7	1.00	7.68	2.73	7.68
#FFFFFF	7.68	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#105AAA

Deuteranopia (green-blind)

#004DA5

Tritanopia (blue-blind)

#006473

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4fa7;
/* rgb */ color: rgb(31, 79, 167);
/* oklch */ color: oklch(44.8% 0.151 261.3);

Tailwind

colors: {
  custom: {
    50: '#727fc2',
    500: '#1f4fa7',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fa7;
$custom-light: #727fc2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fa7",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 167
  },
  "hsl": {
    "h": 218.824,
    "s": 68.687,
    "l": 38.824
  },
  "oklch": {
    "l": 0.44848,
    "c": 0.1513,
    "h": 261.3
  },
  "luminance": 0.08673
}

Semantic roles & 50–950 ramp

primary

#1F4FA7

secondary

#C6A05C

accent

#AE3CEC

background

#F7F7FC

surface

#EDEEF8

border

#C8C9D1

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F4FA7

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

Preview Lab → · Contrast checker → · Palette generator →