#1F4DAE#1F4DAE

#1F4DAE is a dark, vivid blue. Relative luminance 0.087; OKLCH L 45.0% C 0.163 H 262.6°. Best body text is #FFFFFF at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F4DAE
RGB	rgb(31, 77, 174)
HSL	hsl(221, 70%, 40%)
HSV	hsv(221, 82%, 68%)
CMYK	cmyk(82.2%, 55.7%, 0%, 31.8%)
CIE-LAB	lab(35.31, 21.44, -56.12)
CIE-LCH	lch(35.31, 60.07, 290.91°)
OKLab	oklab(44.99% -0.0209 -0.162)
OKLCH	oklch(44.99% 0.163 262.6)
XYZ	xyz(10.8562, 8.6537, 41.1344)
Luminance	0.0866 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4DAE #AE801F

analogous

#1F95AE #1F4DAE #381FAE

triadic

#1F4DAE #AE1F4D #4DAE1F

tetradic

#1F4DAE #AE1F95 #AE801F #1FAE38

square

#1F4DAE #AE1F95 #AE801F #1FAE38

split-complementary

#1F4DAE #AE381F #95AE1F

monochromatic

#0C1F46 #16367A #1F4DAE #3067DA #648DE3

Accessibility & contrast

On white

7.69

#1F4DAE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.73

#1F4DAE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4DAE

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4DAE	#FFFFFF	#000000	##FFFFFF
##1F4DAE	1.00	7.69	2.73	7.69
#FFFFFF	7.69	1.00	21.00	1.00
#000000	2.73	21.00	1.00	21.00
##FFFFFF	7.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB1

Deuteranopia (green-blind)

#004DAC

Tritanopia (blue-blind)

#006576

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f4dae;
/* rgb */ color: rgb(31, 77, 174);
/* oklch */ color: oklch(45.0% 0.163 262.6);

Tailwind

colors: {
  custom: {
    50: '#747ec7',
    500: '#1f4dae',
    950: '#000000',
  },
}

SCSS

$custom: #1f4dae;
$custom-light: #747ec7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4dae",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 174
  },
  "hsl": {
    "h": 220.699,
    "s": 69.756,
    "l": 40.196
  },
  "oklch": {
    "l": 0.44986,
    "c": 0.16335,
    "h": 262.6
  },
  "luminance": 0.08655
}

Semantic roles & 50–950 ramp

primary

#1F4DAE

secondary

#C8A760

accent

#B43BED

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4DAE

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

Preview Lab → · Contrast checker → · Palette generator →