#1F4DA8#1F4DA8

#1F4DA8 is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.5% C 0.155 H 262.1°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F4DA8
RGB	rgb(31, 77, 168)
HSL	hsl(220, 69%, 39%)
HSV	hsv(220, 82%, 66%)
CMYK	cmyk(81.5%, 54.2%, 0%, 34.1%)
CIE-LAB	lab(34.85, 19.07, -53.29)
CIE-LCH	lch(34.85, 56.59, 289.69°)
OKLab	oklab(44.5% -0.0215 -0.1537)
OKLCH	oklch(44.5% 0.155 262.1)
XYZ	xyz(10.2843, 8.4250, 38.1224)
Luminance	0.0843 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4DA8 #A87A1F

analogous

#1F92A8 #1F4DA8 #361FA8

triadic

#1F4DA8 #A81F4D #4DA81F

tetradic

#1F4DA8 #A81F92 #A87A1F #1FA836

square

#1F4DA8 #A81F92 #A87A1F #1FA836

split-complementary

#1F4DA8 #A8361F #92A81F

monochromatic

#0C1E41 #153574 #1F4DA8 #2C66D8 #608BE2

Accessibility & contrast

On white

7.82

#1F4DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1F4DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4DA8

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4DA8	#FFFFFF	#000000	##FFFFFF
##1F4DA8	1.00	7.82	2.69	7.82
#FFFFFF	7.82	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059AB

Deuteranopia (green-blind)

#004CA6

Tritanopia (blue-blind)

#006373

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4da8;
/* rgb */ color: rgb(31, 77, 168);
/* oklch */ color: oklch(44.5% 0.155 262.1);

Tailwind

colors: {
  custom: {
    50: '#727ec3',
    500: '#1f4da8',
    950: '#000000',
  },
}

SCSS

$custom: #1f4da8;
$custom-light: #727ec3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4da8",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 168
  },
  "hsl": {
    "h": 219.854,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44497,
    "c": 0.15517,
    "h": 262.1
  },
  "luminance": 0.08426
}

Semantic roles & 50–950 ramp

primary

#1F4DA8

secondary

#C6A35D

accent

#B13CEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4DA8

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

Preview Lab → · Contrast checker → · Palette generator →