#1F3580#1F3580

#1F3580 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.0% C 0.130 H 267.1°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#1F3580
RGB	rgb(31, 53, 128)
HSL	hsl(226, 61%, 31%)
HSV	hsv(226, 76%, 50%)
CMYK	cmyk(75.8%, 58.6%, 0%, 49.8%)
CIE-LAB	lab(24.94, 19.63, -44.91)
CIE-LCH	lch(24.94, 49.01, 293.62°)
OKLab	oklab(36.02% -0.0065 -0.1295)
OKLCH	oklch(36.02% 0.13 267.1)
XYZ	xyz(5.7331, 4.3954, 20.9641)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3580 #806A1F

analogous

#1F6580 #1F3580 #391F80

triadic

#1F3580 #801F35 #35801F

tetradic

#1F3580 #801F65 #806A1F #1F8039

square

#1F3580 #801F65 #806A1F #1F8039

split-complementary

#1F3580 #80391F #65801F

monochromatic

#070C1D #13214F #1F3580 #2B49B1 #4767D2

Accessibility & contrast

On white

11.17

#1F3580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1F3580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3580

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3580	#FFFFFF	#000000	##FFFFFF
##1F3580	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004083

Deuteranopia (green-blind)

#00377F

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3580;
/* rgb */ color: rgb(31, 53, 128);
/* oklch */ color: oklch(36.0% 0.130 267.1);

Tailwind

colors: {
  custom: {
    50: '#6a6ba5',
    500: '#1f3580',
    950: '#000000',
  },
}

SCSS

$custom: #1f3580;
$custom-light: #6a6ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3580",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 128
  },
  "hsl": {
    "h": 226.392,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.36024,
    "c": 0.12964,
    "h": 267.1
  },
  "luminance": 0.04396
}

Semantic roles & 50–950 ramp

primary

#1F3580

secondary

#B39B48

accent

#C044E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F3580

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

Preview Lab → · Contrast checker → · Palette generator →