#1F3384#1F3384

#1F3384 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.0% C 0.138 H 268.0°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#1F3384
RGB	rgb(31, 51, 132)
HSL	hsl(228, 62%, 32%)
HSV	hsv(228, 77%, 52%)
CMYK	cmyk(76.5%, 61.4%, 0%, 48.2%)
CIE-LAB	lab(24.72, 22.61, -47.78)
CIE-LCH	lch(24.72, 52.86, 295.33°)
OKLab	oklab(35.96% -0.0048 -0.1379)
OKLCH	oklch(35.96% 0.138 268)
XYZ	xyz(5.9123, 4.3243, 22.3484)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3384 #84701F

analogous

#1F6684 #1F3384 #3E1F84

triadic

#1F3384 #841F33 #33841F

tetradic

#1F3384 #841F66 #84701F #1F843E

square

#1F3384 #841F66 #84701F #1F843E

split-complementary

#1F3384 #843E1F #66841F

monochromatic

#080D21 #132052 #1F3384 #2B46B6 #4965D4

Accessibility & contrast

On white

11.26

#1F3384 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F3384 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3384

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3384	#FFFFFF	#000000	##FFFFFF
##1F3384	1.00	11.26	1.87	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004087

Deuteranopia (green-blind)

#003682

Tritanopia (blue-blind)

#004756

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3384;
/* rgb */ color: rgb(31, 51, 132);
/* oklch */ color: oklch(36.0% 0.138 268.0);

Tailwind

colors: {
  custom: {
    50: '#6b6aa8',
    500: '#1f3384',
    950: '#000000',
  },
}

SCSS

$custom: #1f3384;
$custom-light: #6b6aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3384",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 132
  },
  "hsl": {
    "h": 228.119,
    "s": 61.963,
    "l": 31.961
  },
  "oklch": {
    "l": 0.35963,
    "c": 0.13802,
    "h": 268
  },
  "luminance": 0.04325
}

Semantic roles & 50–950 ramp

primary

#1F3384

secondary

#B7A148

accent

#C543E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1F3384

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

Preview Lab → · Contrast checker → · Palette generator →