#1F3579#1F3579

#1F3579 is a dark, moderate blue. Relative luminance 0.042; OKLCH L 35.4% C 0.119 H 266.7°. Best body text is #FFFFFF at 11.39:1 contrast (WCAG AA passes).

Color values

HEX	#1F3579
RGB	rgb(31, 53, 121)
HSL	hsl(225, 59%, 30%)
HSV	hsv(225, 74%, 47%)
CMYK	cmyk(74.4%, 56.2%, 0%, 52.5%)
CIE-LAB	lab(24.38, 16.84, -41.40)
CIE-LCH	lch(24.38, 44.69, 292.13°)
OKLab	oklab(35.43% -0.0069 -0.1192)
OKLCH	oklch(35.43% 0.119 266.7)
XYZ	xyz(5.2882, 4.2174, 18.6208)
Luminance	0.0422 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3579 #79631F

analogous

#1F6279 #1F3579 #361F79

triadic

#1F3579 #791F35 #35791F

tetradic

#1F3579 #791F62 #79631F #1F7936

square

#1F3579 #791F62 #79631F #1F7936

split-complementary

#1F3579 #79361F #62791F

monochromatic

#060B18 #132048 #1F3579 #2B4AAA #4366CF

Accessibility & contrast

On white

11.39

#1F3579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1F3579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3579

11.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3579	#FFFFFF	#000000	##FFFFFF
##1F3579	1.00	11.39	1.84	11.39
#FFFFFF	11.39	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#013E7B

Deuteranopia (green-blind)

#003678

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f3579;
/* rgb */ color: rgb(31, 53, 121);
/* oklch */ color: oklch(35.4% 0.119 266.7);

Tailwind

colors: {
  custom: {
    50: '#686ba0',
    500: '#1f3579',
    950: '#000000',
  },
}

SCSS

$custom: #1f3579;
$custom-light: #686ba0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3579",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 121
  },
  "hsl": {
    "h": 225.333,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.35425,
    "c": 0.11936,
    "h": 266.7
  },
  "luminance": 0.04218
}

Semantic roles & 50–950 ramp

primary

#1F3579

secondary

#AC9447

accent

#BC45E2

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060F

muted

#7A7A7E

Preview Lab

Preview with #1F3579

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

Preview Lab → · Contrast checker → · Palette generator →