#1F3FAE#1F3FAE

#1F3FAE is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.181 H 266.0°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F3FAE
RGB	rgb(31, 63, 174)
HSL	hsl(227, 70%, 40%)
HSV	hsv(227, 82%, 68%)
CMYK	cmyk(82.2%, 63.8%, 0%, 31.8%)
CIE-LAB	lab(31.58, 30.80, -62.20)
CIE-LCH	lch(31.58, 69.41, 296.34°)
OKLab	oklab(42.2% -0.0125 -0.1801)
OKLCH	oklch(42.2% 0.181 266)
XYZ	xyz(9.9799, 6.9011, 40.8423)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3FAE #AE8E1F

analogous

#1F87AE #1F3FAE #461FAE

triadic

#1F3FAE #AE1F3F #3FAE1F

tetradic

#1F3FAE #AE1F87 #AE8E1F #1FAE46

square

#1F3FAE #AE1F87 #AE8E1F #1FAE46

split-complementary

#1F3FAE #AE461F #87AE1F

monochromatic

#0C1946 #162C7A #1F3FAE #3056DA #6481E3

Accessibility & contrast

On white

8.82

#1F3FAE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#1F3FAE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3FAE

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3FAE	#FFFFFF	#000000	##FFFFFF
##1F3FAE	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B2

Deuteranopia (green-blind)

#0044AC

Tritanopia (blue-blind)

#005C70

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f3fae;
/* rgb */ color: rgb(31, 63, 174);
/* oklch */ color: oklch(42.2% 0.181 266.0);

Tailwind

colors: {
  custom: {
    50: '#7573c7',
    500: '#1f3fae',
    950: '#000000',
  },
}

SCSS

$custom: #1f3fae;
$custom-light: #7573c7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3fae",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 174
  },
  "hsl": {
    "h": 226.573,
    "s": 69.756,
    "l": 40.196
  },
  "oklch": {
    "l": 0.42198,
    "c": 0.18051,
    "h": 266
  },
  "luminance": 0.06902
}

Semantic roles & 50–950 ramp

primary

#1F3FAE

secondary

#C8B160

accent

#C53BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F3FAE

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

Preview Lab → · Contrast checker → · Palette generator →