#1F4DAD#1F4DAD

#1F4DAD is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.9% C 0.162 H 262.6°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F4DAD
RGB	rgb(31, 77, 173)
HSL	hsl(221, 70%, 40%)
HSV	hsv(221, 82%, 68%)
CMYK	cmyk(82.1%, 55.5%, 0%, 32.2%)
CIE-LAB	lab(35.23, 21.04, -55.65)
CIE-LCH	lch(35.23, 59.49, 290.71°)
OKLab	oklab(44.9% -0.021 -0.1606)
OKLCH	oklch(44.9% 0.162 262.6)
XYZ	xyz(10.7591, 8.6149, 40.6228)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4DAD #AD7F1F

analogous

#1F94AD #1F4DAD #381FAD

triadic

#1F4DAD #AD1F4D #4DAD1F

tetradic

#1F4DAD #AD1F94 #AD7F1F #1FAD38

square

#1F4DAD #AD1F94 #AD7F1F #1FAD38

split-complementary

#1F4DAD #AD381F #94AD1F

monochromatic

#0C1F45 #163679 #1F4DAD #2F67DA #638DE3

Accessibility & contrast

On white

7.71

#1F4DAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1F4DAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4DAD

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4DAD	#FFFFFF	#000000	##FFFFFF
##1F4DAD	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB0

Deuteranopia (green-blind)

#004DAB

Tritanopia (blue-blind)

#006575

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4dad;
/* rgb */ color: rgb(31, 77, 173);
/* oklch */ color: oklch(44.9% 0.162 262.6);

Tailwind

colors: {
  custom: {
    50: '#737ec6',
    500: '#1f4dad',
    950: '#000000',
  },
}

SCSS

$custom: #1f4dad;
$custom-light: #737ec6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4dad",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 173
  },
  "hsl": {
    "h": 220.563,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.44904,
    "c": 0.162,
    "h": 262.6
  },
  "luminance": 0.08616
}

Semantic roles & 50–950 ramp

primary

#1F4DAD

secondary

#C8A660

accent

#B33BEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4DAD

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

Preview Lab → · Contrast checker → · Palette generator →