#1F4FAD#1F4FAD

#1F4FAD is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.3% C 0.160 H 261.9°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F4FAD
RGB	rgb(31, 79, 173)
HSL	hsl(220, 70%, 40%)
HSV	hsv(220, 82%, 68%)
CMYK	cmyk(82.1%, 54.3%, 0%, 32.2%)
CIE-LAB	lab(35.79, 19.70, -54.74)
CIE-LCH	lch(35.79, 58.18, 289.79°)
OKLab	oklab(45.33% -0.0224 -0.1579)
OKLCH	oklch(45.33% 0.16 261.9)
XYZ	xyz(10.9012, 8.8991, 40.6702)
Luminance	0.0890 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4FAD #AD7D1F

analogous

#1F96AD #1F4FAD #361FAD

triadic

#1F4FAD #AD1F4F #4FAD1F

tetradic

#1F4FAD #AD1F96 #AD7D1F #1FAD36

square

#1F4FAD #AD1F96 #AD7D1F #1FAD36

split-complementary

#1F4FAD #AD361F #96AD1F

monochromatic

#0C2045 #163779 #1F4FAD #2F69DA #638FE3

Accessibility & contrast

On white

7.55

#1F4FAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#1F4FAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4FAD

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4FAD	#FFFFFF	#000000	##FFFFFF
##1F4FAD	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB0

Deuteranopia (green-blind)

#004EAB

Tritanopia (blue-blind)

#006676

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f4fad;
/* rgb */ color: rgb(31, 79, 173);
/* oklch */ color: oklch(45.3% 0.160 261.9);

Tailwind

colors: {
  custom: {
    50: '#737fc6',
    500: '#1f4fad',
    950: '#000000',
  },
}

SCSS

$custom: #1f4fad;
$custom-light: #737fc6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4fad",
  "rgb": {
    "r": 31,
    "g": 79,
    "b": 173
  },
  "hsl": {
    "h": 219.718,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.45326,
    "c": 0.15951,
    "h": 261.9
  },
  "luminance": 0.089
}

Semantic roles & 50–950 ramp

primary

#1F4FAD

secondary

#C8A560

accent

#B13BEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1F4FAD

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

Preview Lab → · Contrast checker → · Palette generator →