#1F3793#1F3793

#1F3793 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.1% C 0.154 H 267.2°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F3793
RGB	rgb(31, 55, 147)
HSL	hsl(228, 65%, 35%)
HSV	hsv(228, 79%, 58%)
CMYK	cmyk(78.9%, 62.6%, 0%, 42.4%)
CIE-LAB	lab(27.10, 25.74, -53.19)
CIE-LCH	lch(27.10, 59.09, 295.83°)
OKLab	oklab(38.14% -0.0075 -0.1538)
OKLCH	oklch(38.14% 0.154 267.2)
XYZ	xyz(7.1959, 5.1295, 28.2089)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3793 #937B1F

analogous

#1F7193 #1F3793 #411F93

triadic

#1F3793 #931F37 #37931F

tetradic

#1F3793 #931F71 #937B1F #1F9341

square

#1F3793 #931F71 #937B1F #1F9341

split-complementary

#1F3793 #93411F #71931F

monochromatic

#0A112E #142460 #1F3793 #2A4AC6 #526EDA

Accessibility & contrast

On white

10.37

#1F3793 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F3793 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3793

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3793	#FFFFFF	#000000	##FFFFFF
##1F3793	1.00	10.37	2.03	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004696

Deuteranopia (green-blind)

#003B91

Tritanopia (blue-blind)

#004F5F

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3793;
/* rgb */ color: rgb(31, 55, 147);
/* oklch */ color: oklch(38.1% 0.154 267.2);

Tailwind

colors: {
  custom: {
    50: '#6e6db4',
    500: '#1f3793',
    950: '#000000',
  },
}

SCSS

$custom: #1f3793;
$custom-light: #6e6db4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3793",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 147
  },
  "hsl": {
    "h": 227.586,
    "s": 65.169,
    "l": 34.902
  },
  "oklch": {
    "l": 0.3814,
    "c": 0.15394,
    "h": 267.2
  },
  "luminance": 0.0513
}

Semantic roles & 50–950 ramp

primary

#1F3793

secondary

#BEA750

accent

#C540E8

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3793

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

Preview Lab → · Contrast checker → · Palette generator →