#1F3F97#1F3F97

#1F3F97 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.1% C 0.149 H 265.1°. Best body text is #FFFFFF at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F97
RGB	rgb(31, 63, 151)
HSL	hsl(224, 66%, 36%)
HSV	hsv(224, 79%, 59%)
CMYK	cmyk(79.5%, 58.3%, 0%, 40.8%)
CIE-LAB	lab(29.61, 21.84, -51.54)
CIE-LCH	lch(29.61, 55.98, 292.97°)
OKLab	oklab(40.12% -0.0129 -0.1488)
OKLCH	oklch(40.12% 0.149 265.1)
XYZ	xyz(7.9265, 6.0798, 30.0279)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F97 #97771F

analogous

#1F7B97 #1F3F97 #3B1F97

triadic

#1F3F97 #971F3F #3F971F

tetradic

#1F3F97 #971F7B #97771F #1F973B

square

#1F3F97 #971F7B #97771F #1F973B

split-complementary

#1F3F97 #973B1F #7B971F

monochromatic

#0A1531 #152A64 #1F3F97 #2954CA #5479DC

Accessibility & contrast

On white

9.48

#1F3F97 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F3F97 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F97

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F97	#FFFFFF	#000000	##FFFFFF
##1F3F97	1.00	9.48	2.22	9.48
#FFFFFF	9.48	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9A

Deuteranopia (green-blind)

#004095

Tritanopia (blue-blind)

#005564

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3f97;
/* rgb */ color: rgb(31, 63, 151);
/* oklch */ color: oklch(40.1% 0.149 265.1);

Tailwind

colors: {
  custom: {
    50: '#6f73b6',
    500: '#1f3f97',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f97;
$custom-light: #6f73b6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f97",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 151
  },
  "hsl": {
    "h": 224,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.40122,
    "c": 0.14937,
    "h": 265.1
  },
  "luminance": 0.06081
}

Semantic roles & 50–950 ramp

primary

#1F3F97

secondary

#BFA252

accent

#BC3FE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F3F97

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

Preview Lab → · Contrast checker → · Palette generator →