#1F3DBC#1F3DBC

#1F3DBC is a dark, highly saturated blue. Relative luminance 0.073; OKLCH L 43.2% C 0.201 H 266.6°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#1F3DBC
RGB	rgb(31, 61, 188)
HSL	hsl(229, 72%, 43%)
HSV	hsv(229, 84%, 74%)
CMYK	cmyk(83.5%, 67.6%, 0%, 26.3%)
CIE-LAB	lab(32.39, 37.34, -69.18)
CIE-LCH	lch(32.39, 78.62, 298.36°)
OKLab	oklab(43.19% -0.012 -0.2005)
OKLCH	oklch(43.19% 0.201 266.6)
XYZ	xyz(11.3077, 7.2583, 48.3722)
Luminance	0.0726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.12

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3DBC #BC9E1F

analogous

#1F8BBC #1F3DBC #4F1FBC

triadic

#1F3DBC #BC1F3D #3DBC1F

tetradic

#1F3DBC #BC1F8B #BC9E1F #1FBC4F

square

#1F3DBC #BC1F8B #BC9E1F #1FBC4F

split-complementary

#1F3DBC #BC4F1F #8BBC1F

monochromatic

#0E1B53 #162C87 #1F3DBC #3A59DE #6E85E7

Accessibility & contrast

On white

8.56

#1F3DBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1F3DBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3DBC

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3DBC	#FFFFFF	#000000	##FFFFFF
##1F3DBC	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C0

Deuteranopia (green-blind)

#0045BA

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f3dbc;
/* rgb */ color: rgb(31, 61, 188);
/* oklch */ color: oklch(43.2% 0.201 266.6);

Tailwind

colors: {
  custom: {
    50: '#7972d1',
    500: '#1f3dbc',
    950: '#000000',
  },
}

SCSS

$custom: #1f3dbc;
$custom-light: #7972d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3dbc",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 188
  },
  "hsl": {
    "h": 228.535,
    "s": 71.689,
    "l": 42.941
  },
  "oklch": {
    "l": 0.43186,
    "c": 0.20084,
    "h": 266.6
  },
  "luminance": 0.0726
}

Semantic roles & 50–950 ramp

primary

#1F3DBC

secondary

#CDBA69

accent

#CC39EE

background

#F8F6FD

surface

#EFECFA

border

#CAC7D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #1F3DBC

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

Preview Lab → · Contrast checker → · Palette generator →