#1F3584#1F3584

#1F3584 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.135 H 267.3°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F3584
RGB	rgb(31, 53, 132)
HSL	hsl(227, 62%, 32%)
HSV	hsv(227, 77%, 52%)
CMYK	cmyk(76.5%, 59.8%, 0%, 48.2%)
CIE-LAB	lab(25.27, 21.22, -46.88)
CIE-LCH	lch(25.27, 51.46, 294.36°)
OKLab	oklab(36.38% -0.0063 -0.1353)
OKLCH	oklch(36.38% 0.135 267.3)
XYZ	xyz(6.0016, 4.5028, 22.3782)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3584 #846E1F

analogous

#1F6884 #1F3584 #3C1F84

triadic

#1F3584 #841F35 #35841F

tetradic

#1F3584 #841F68 #846E1F #1F843C

square

#1F3584 #841F68 #846E1F #1F843C

split-complementary

#1F3584 #843C1F #68841F

monochromatic

#080D21 #132152 #1F3584 #2B49B6 #4967D4

Accessibility & contrast

On white

11.05

#1F3584 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1F3584 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3584

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3584	#FFFFFF	#000000	##FFFFFF
##1F3584	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004187

Deuteranopia (green-blind)

#003782

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f3584;
/* rgb */ color: rgb(31, 53, 132);
/* oklch */ color: oklch(36.4% 0.135 267.3);

Tailwind

colors: {
  custom: {
    50: '#6b6ba8',
    500: '#1f3584',
    950: '#000000',
  },
}

SCSS

$custom: #1f3584;
$custom-light: #6b6ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3584",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 132
  },
  "hsl": {
    "h": 226.931,
    "s": 61.963,
    "l": 31.961
  },
  "oklch": {
    "l": 0.36375,
    "c": 0.13542,
    "h": 267.3
  },
  "luminance": 0.04503
}

Semantic roles & 50–950 ramp

primary

#1F3584

secondary

#B79F48

accent

#C243E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1F3584

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

Preview Lab → · Contrast checker → · Palette generator →