#1F409D#1F409D

#1F409D is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.8% C 0.156 H 265.1°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#1F409D
RGB	rgb(31, 64, 157)
HSL	hsl(224, 67%, 37%)
HSV	hsv(224, 80%, 62%)
CMYK	cmyk(80.3%, 59.2%, 0%, 38.4%)
CIE-LAB	lab(30.38, 23.53, -53.94)
CIE-LCH	lch(30.38, 58.85, 293.57°)
OKLab	oklab(40.85% -0.0133 -0.1558)
OKLCH	oklch(40.85% 0.156 265.1)
XYZ	xyz(8.4821, 6.3914, 32.6784)
Luminance	0.0639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F409D #9D7C1F

analogous

#1F7F9D #1F409D #3D1F9D

triadic

#1F409D #9D1F40 #409D1F

tetradic

#1F409D #9D1F7F #9D7C1F #1F9D3D

square

#1F409D #9D1F7F #9D7C1F #1F9D3D

split-complementary

#1F409D #9D3D1F #7F9D1F

monochromatic

#0B1637 #152B6A #1F409D #2955D0 #587BDE

Accessibility & contrast

On white

9.22

#1F409D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1F409D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F409D

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F409D	#FFFFFF	#000000	##FFFFFF
##1F409D	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA0

Deuteranopia (green-blind)

#00429B

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f409d;
/* rgb */ color: rgb(31, 64, 157);
/* oklch */ color: oklch(40.8% 0.156 265.1);

Tailwind

colors: {
  custom: {
    50: '#7074bb',
    500: '#1f409d',
    950: '#000000',
  },
}

SCSS

$custom: #1f409d;
$custom-light: #7074bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f409d",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 157
  },
  "hsl": {
    "h": 224.286,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.4085,
    "c": 0.15641,
    "h": 265.1
  },
  "luminance": 0.06392
}

Semantic roles & 50–950 ramp

primary

#1F409D

secondary

#C2A656

accent

#BD3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F409D

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

Preview Lab → · Contrast checker → · Palette generator →