#1F3C91#1F3C91

#1F3C91 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.0% C 0.145 H 265.6°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C91
RGB	rgb(31, 60, 145)
HSL	hsl(225, 65%, 35%)
HSV	hsv(225, 79%, 57%)
CMYK	cmyk(78.6%, 58.6%, 0%, 43.1%)
CIE-LAB	lab(28.29, 21.53, -50.02)
CIE-LCH	lch(28.29, 54.45, 293.29°)
OKLab	oklab(38.98% -0.011 -0.1444)
OKLCH	oklch(38.98% 0.145 265.6)
XYZ	xyz(7.2900, 5.5665, 27.4728)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C91 #91741F

analogous

#1F7591 #1F3C91 #3B1F91

triadic

#1F3C91 #911F3C #3C911F

tetradic

#1F3C91 #911F75 #91741F #1F913B

square

#1F3C91 #911F75 #91741F #1F913B

split-complementary

#1F3C91 #913B1F #75911F

monochromatic

#09122C #14275F #1F3C91 #2A51C3 #5174DA

Accessibility & contrast

On white

9.94

#1F3C91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1F3C91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C91

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C91	#FFFFFF	#000000	##FFFFFF
##1F3C91	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004894

Deuteranopia (green-blind)

#003E8F

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3c91;
/* rgb */ color: rgb(31, 60, 145);
/* oklch */ color: oklch(39.0% 0.145 265.6);

Tailwind

colors: {
  custom: {
    50: '#6d71b2',
    500: '#1f3c91',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c91;
$custom-light: #6d71b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c91",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 145
  },
  "hsl": {
    "h": 224.737,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38976,
    "c": 0.1448,
    "h": 265.6
  },
  "luminance": 0.05567
}

Semantic roles & 50–950 ramp

primary

#1F3C91

secondary

#BDA14F

accent

#BD40E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3C91

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

Preview Lab → · Contrast checker → · Palette generator →