#1F3CA1#1F3CA1

#1F3CA1 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.167 H 266.3°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#1F3CA1
RGB	rgb(31, 60, 161)
HSL	hsl(227, 68%, 38%)
HSV	hsv(227, 81%, 63%)
CMYK	cmyk(80.7%, 62.7%, 0%, 36.9%)
CIE-LAB	lab(29.65, 27.80, -57.55)
CIE-LCH	lch(29.65, 63.91, 295.78°)
OKLab	oklab(40.41% -0.0107 -0.1665)
OKLCH	oklch(40.41% 0.167 266.3)
XYZ	xyz(8.6117, 6.0952, 34.4339)
Luminance	0.0610 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3CA1 #A1841F

analogous

#1F7DA1 #1F3CA1 #431FA1

triadic

#1F3CA1 #A11F3C #3CA11F

tetradic

#1F3CA1 #A11F7D #A1841F #1FA143

square

#1F3CA1 #A11F7D #A1841F #1FA143

split-complementary

#1F3CA1 #A1431F #7DA11F

monochromatic

#0B163A #15296E #1F3CA1 #294FD4 #5B79DF

Accessibility & contrast

On white

9.46

#1F3CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F3CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3CA1

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3CA1	#FFFFFF	#000000	##FFFFFF
##1F3CA1	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#00409F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3ca1;
/* rgb */ color: rgb(31, 60, 161);
/* oklch */ color: oklch(40.4% 0.167 266.3);

Tailwind

colors: {
  custom: {
    50: '#7271be',
    500: '#1f3ca1',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ca1;
$custom-light: #7271be;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ca1",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 161
  },
  "hsl": {
    "h": 226.615,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40414,
    "c": 0.16683,
    "h": 266.3
  },
  "luminance": 0.06096
}

Semantic roles & 50–950 ramp

primary

#1F3CA1

secondary

#C4AC58

accent

#C43DEB

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3CA1

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

Preview Lab → · Contrast checker → · Palette generator →