#1F3F98#1F3F98

#1F3F98 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.151 H 265.1°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F98
RGB	rgb(31, 63, 152)
HSL	hsl(224, 66%, 36%)
HSV	hsv(224, 80%, 60%)
CMYK	cmyk(79.6%, 58.6%, 0%, 40.4%)
CIE-LAB	lab(29.69, 22.24, -52.02)
CIE-LCH	lch(29.69, 56.57, 293.15°)
OKLab	oklab(40.21% -0.0128 -0.1502)
OKLCH	oklch(40.21% 0.151 265.1)
XYZ	xyz(8.0081, 6.1124, 30.4574)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F98 #98781F

analogous

#1F7B98 #1F3F98 #3B1F98

triadic

#1F3F98 #981F3F #3F981F

tetradic

#1F3F98 #981F7B #98781F #1F983B

square

#1F3F98 #981F7B #98781F #1F983B

split-complementary

#1F3F98 #983B1F #7B981F

monochromatic

#0A1532 #152A65 #1F3F98 #2954CB #5579DC

Accessibility & contrast

On white

9.45

#1F3F98 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F3F98 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F98

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F98	#FFFFFF	#000000	##FFFFFF
##1F3F98	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9B

Deuteranopia (green-blind)

#004196

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3f98;
/* rgb */ color: rgb(31, 63, 152);
/* oklch */ color: oklch(40.2% 0.151 265.1);

Tailwind

colors: {
  custom: {
    50: '#6f73b7',
    500: '#1f3f98',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f98;
$custom-light: #6f73b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f98",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 152
  },
  "hsl": {
    "h": 224.132,
    "s": 66.12,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40208,
    "c": 0.15076,
    "h": 265.1
  },
  "luminance": 0.06113
}

Semantic roles & 50–950 ramp

primary

#1F3F98

secondary

#C0A353

accent

#BC3FE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #1F3F98

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

Preview Lab → · Contrast checker → · Palette generator →