#1F3CBC#1F3CBC

#1F3CBC is a dark, highly saturated blue. Relative luminance 0.072; OKLCH L 43.0% C 0.202 H 266.7°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3CBC
RGB	rgb(31, 60, 188)
HSL	hsl(229, 72%, 43%)
HSV	hsv(229, 84%, 74%)
CMYK	cmyk(83.5%, 68.1%, 0%, 26.3%)
CIE-LAB	lab(32.15, 37.98, -69.57)
CIE-LCH	lch(32.15, 79.26, 298.63°)
OKLab	oklab(43.01% -0.0116 -0.2016)
OKLCH	oklch(43.01% 0.202 266.7)
XYZ	xyz(11.2549, 7.1525, 48.3546)
Luminance	0.0715 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.04

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3CBC #BC9F1F

analogous

#1F8ABC #1F3CBC #501FBC

triadic

#1F3CBC #BC1F3C #3CBC1F

tetradic

#1F3CBC #BC1F8A #BC9F1F #1FBC50

square

#1F3CBC #BC1F8A #BC9F1F #1FBC50

split-complementary

#1F3CBC #BC501F #8ABC1F

monochromatic

#0E1A53 #162B87 #1F3CBC #3A58DE #6E85E7

Accessibility & contrast

On white

8.64

#1F3CBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1F3CBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3CBC

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3CBC	#FFFFFF	#000000	##FFFFFF
##1F3CBC	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C0

Deuteranopia (green-blind)

#0044BA

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f3cbc;
/* rgb */ color: rgb(31, 60, 188);
/* oklch */ color: oklch(43.0% 0.202 266.7);

Tailwind

colors: {
  custom: {
    50: '#7972d1',
    500: '#1f3cbc',
    950: '#000000',
  },
}

SCSS

$custom: #1f3cbc;
$custom-light: #7972d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3cbc",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 188
  },
  "hsl": {
    "h": 228.917,
    "s": 71.689,
    "l": 42.941
  },
  "oklch": {
    "l": 0.43014,
    "c": 0.20195,
    "h": 266.7
  },
  "luminance": 0.07154
}

Semantic roles & 50–950 ramp

primary

#1F3CBC

secondary

#CDBB69

accent

#CD39EE

background

#F8F6FD

surface

#EFECFA

border

#CAC7D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #1F3CBC

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

Preview Lab → · Contrast checker → · Palette generator →