#1F3AAE#1F3AAE

#1F3AAE is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.3% C 0.186 H 266.9°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F3AAE
RGB	rgb(31, 58, 174)
HSL	hsl(229, 70%, 40%)
HSV	hsv(229, 82%, 68%)
CMYK	cmyk(82.2%, 66.7%, 0%, 31.8%)
CIE-LAB	lab(30.33, 34.07, -64.25)
CIE-LCH	lch(30.33, 72.72, 297.94°)
OKLab	oklab(41.28% -0.0099 -0.1861)
OKLCH	oklch(41.28% 0.186 266.9)
XYZ	xyz(9.7154, 6.3723, 40.7541)
Luminance	0.0637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3AAE #AE931F

analogous

#1F82AE #1F3AAE #4B1FAE

triadic

#1F3AAE #AE1F3A #3AAE1F

tetradic

#1F3AAE #AE1F82 #AE931F #1FAE4B

square

#1F3AAE #AE1F82 #AE931F #1FAE4B

split-complementary

#1F3AAE #AE4B1F #82AE1F

monochromatic

#0C1746 #16297A #1F3AAE #3050DA #647CE3

Accessibility & contrast

On white

9.23

#1F3AAE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F3AAE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3AAE

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3AAE	#FFFFFF	#000000	##FFFFFF
##1F3AAE	1.00	9.23	2.27	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB2

Deuteranopia (green-blind)

#0041AC

Tritanopia (blue-blind)

#00596F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f3aae;
/* rgb */ color: rgb(31, 58, 174);
/* oklch */ color: oklch(41.3% 0.186 266.9);

Tailwind

colors: {
  custom: {
    50: '#7570c7',
    500: '#1f3aae',
    950: '#000000',
  },
}

SCSS

$custom: #1f3aae;
$custom-light: #7570c7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3aae",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 174
  },
  "hsl": {
    "h": 228.671,
    "s": 69.756,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4128,
    "c": 0.18638,
    "h": 266.9
  },
  "luminance": 0.06373
}

Semantic roles & 50–950 ramp

primary

#1F3AAE

secondary

#C8B560

accent

#CB3BED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1F3AAE

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

Preview Lab → · Contrast checker → · Palette generator →