#1F4BA4#1F4BA4

#1F4BA4 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.7% C 0.152 H 262.3°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#1F4BA4
RGB	rgb(31, 75, 164)
HSL	hsl(220, 68%, 38%)
HSV	hsv(220, 81%, 64%)
CMYK	cmyk(81.1%, 54.3%, 0%, 35.7%)
CIE-LAB	lab(33.99, 18.83, -52.29)
CIE-LCH	lch(33.99, 55.58, 289.80°)
OKLab	oklab(43.75% -0.0204 -0.1508)
OKLCH	oklch(43.75% 0.152 262.3)
XYZ	xyz(9.7796, 8.0026, 36.1440)
Luminance	0.0800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4BA4 #A4781F

analogous

#1F8DA4 #1F4BA4 #351FA4

triadic

#1F4BA4 #A41F4B #4BA41F

tetradic

#1F4BA4 #A41F8D #A4781F #1FA435

square

#1F4BA4 #A41F8D #A4781F #1FA435

split-complementary

#1F4BA4 #A4351F #8DA41F

monochromatic

#0C1C3D #153371 #1F4BA4 #2A63D7 #5D88E0

Accessibility & contrast

On white

8.07

#1F4BA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#1F4BA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4BA4

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4BA4	#FFFFFF	#000000	##FFFFFF
##1F4BA4	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056A7

Deuteranopia (green-blind)

#004AA2

Tritanopia (blue-blind)

#006170

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4ba4;
/* rgb */ color: rgb(31, 75, 164);
/* oklch */ color: oklch(43.7% 0.152 262.3);

Tailwind

colors: {
  custom: {
    50: '#717cc0',
    500: '#1f4ba4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4ba4;
$custom-light: #717cc0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4ba4",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 164
  },
  "hsl": {
    "h": 220.15,
    "s": 68.205,
    "l": 38.235
  },
  "oklch": {
    "l": 0.43746,
    "c": 0.15219,
    "h": 262.3
  },
  "luminance": 0.08004
}

Semantic roles & 50–950 ramp

primary

#1F4BA4

secondary

#C5A15A

accent

#B13DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4BA4

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

Preview Lab → · Contrast checker → · Palette generator →