#1F3BBC#1F3BBC

#1F3BBC is a dark, highly saturated blue. Relative luminance 0.070; OKLCH L 42.8% C 0.203 H 266.8°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F3BBC
RGB	rgb(31, 59, 188)
HSL	hsl(229, 72%, 43%)
HSV	hsv(229, 84%, 74%)
CMYK	cmyk(83.5%, 68.6%, 0%, 26.3%)
CIE-LAB	lab(31.92, 38.61, -69.95)
CIE-LCH	lch(31.92, 79.90, 298.90°)
OKLab	oklab(42.84% -0.0112 -0.2027)
OKLCH	oklch(42.84% 0.203 266.8)
XYZ	xyz(11.2030, 7.0487, 48.3373)
Luminance	0.0705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.98

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3BBC #BCA01F

analogous

#1F8ABC #1F3BBC #511FBC

triadic

#1F3BBC #BC1F3B #3BBC1F

tetradic

#1F3BBC #BC1F8A #BCA01F #1FBC51

square

#1F3BBC #BC1F8A #BCA01F #1FBC51

split-complementary

#1F3BBC #BC511F #8ABC1F

monochromatic

#0E1A53 #162B87 #1F3BBC #3A57DE #6E84E7

Accessibility & contrast

On white

8.71

#1F3BBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1F3BBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3BBC

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3BBC	#FFFFFF	#000000	##FFFFFF
##1F3BBC	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C0

Deuteranopia (green-blind)

#0044BA

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f3bbc;
/* rgb */ color: rgb(31, 59, 188);
/* oklch */ color: oklch(42.8% 0.203 266.8);

Tailwind

colors: {
  custom: {
    50: '#7971d1',
    500: '#1f3bbc',
    950: '#000000',
  },
}

SCSS

$custom: #1f3bbc;
$custom-light: #7971d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3bbc",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 188
  },
  "hsl": {
    "h": 229.299,
    "s": 71.689,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42844,
    "c": 0.20305,
    "h": 266.8
  },
  "luminance": 0.0705
}

Semantic roles & 50–950 ramp

primary

#1F3BBC

secondary

#CDBC69

accent

#CE39EE

background

#F8F6FD

surface

#EFECFA

border

#CAC7D3

text

#0B0714

muted

#7C7A83

Preview Lab

Preview with #1F3BBC

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

Preview Lab → · Contrast checker → · Palette generator →