#1F4BA1#1F4BA1

#1F4BA1 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.5% C 0.148 H 261.9°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#1F4BA1
RGB	rgb(31, 75, 161)
HSL	hsl(220, 68%, 38%)
HSV	hsv(220, 81%, 63%)
CMYK	cmyk(80.7%, 53.4%, 0%, 36.9%)
CIE-LAB	lab(33.76, 17.64, -50.86)
CIE-LCH	lch(33.76, 53.83, 289.13°)
OKLab	oklab(43.51% -0.0207 -0.1466)
OKLCH	oklch(43.51% 0.148 261.9)
XYZ	xyz(9.5119, 7.8955, 34.7340)
Luminance	0.0790 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4BA1 #A1751F

analogous

#1F8CA1 #1F4BA1 #341FA1

triadic

#1F4BA1 #A11F4B #4BA11F

tetradic

#1F4BA1 #A11F8C #A1751F #1FA134

square

#1F4BA1 #A11F8C #A1751F #1FA134

split-complementary

#1F4BA1 #A1341F #8CA11F

monochromatic

#0B1B3A #15336E #1F4BA1 #2963D4 #5B88DF

Accessibility & contrast

On white

8.14

#1F4BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#1F4BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4BA1

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4BA1	#FFFFFF	#000000	##FFFFFF
##1F4BA1	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A56A4

Deuteranopia (green-blind)

#004A9F

Tritanopia (blue-blind)

#00606E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4ba1;
/* rgb */ color: rgb(31, 75, 161);
/* oklch */ color: oklch(43.5% 0.148 261.9);

Tailwind

colors: {
  custom: {
    50: '#707cbd',
    500: '#1f4ba1',
    950: '#000000',
  },
}

SCSS

$custom: #1f4ba1;
$custom-light: #707cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4ba1",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 161
  },
  "hsl": {
    "h": 219.692,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.43505,
    "c": 0.14804,
    "h": 261.9
  },
  "luminance": 0.07897
}

Semantic roles & 50–950 ramp

primary

#1F4BA1

secondary

#C49F58

accent

#B03DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4BA1

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

Preview Lab → · Contrast checker → · Palette generator →