#1F4B9C#1F4B9C

#1F4B9C is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.1% C 0.141 H 261.3°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B9C
RGB	rgb(31, 75, 156)
HSL	hsl(219, 67%, 37%)
HSV	hsv(219, 80%, 61%)
CMYK	cmyk(80.1%, 51.9%, 0%, 38.8%)
CIE-LAB	lab(33.40, 15.64, -48.43)
CIE-LCH	lch(33.40, 50.90, 287.90°)
OKLab	oklab(43.11% -0.0213 -0.1394)
OKLCH	oklch(43.11% 0.141 261.3)
XYZ	xyz(9.0797, 7.7227, 32.4581)
Luminance	0.0772 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B9C #9C701F

analogous

#1F8A9C #1F4B9C #321F9C

triadic

#1F4B9C #9C1F4B #4B9C1F

tetradic

#1F4B9C #9C1F8A #9C701F #1F9C32

square

#1F4B9C #9C1F8A #9C701F #1F9C32

split-complementary

#1F4B9C #9C321F #8A9C1F

monochromatic

#0B1A36 #153269 #1F4B9C #2964CF #5887DE

Accessibility & contrast

On white

8.25

#1F4B9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#1F4B9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B9C

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B9C	#FFFFFF	#000000	##FFFFFF
##1F4B9C	1.00	8.25	2.54	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16559F

Deuteranopia (green-blind)

#00499A

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4b9c;
/* rgb */ color: rgb(31, 75, 156);
/* oklch */ color: oklch(43.1% 0.141 261.3);

Tailwind

colors: {
  custom: {
    50: '#6f7cba',
    500: '#1f4b9c',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b9c;
$custom-light: #6f7cba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b9c",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 156
  },
  "hsl": {
    "h": 218.88,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.4311,
    "c": 0.14107,
    "h": 261.3
  },
  "luminance": 0.07724
}

Semantic roles & 50–950 ramp

primary

#1F4B9C

secondary

#C19B55

accent

#AD3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4B9C

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

Preview Lab → · Contrast checker → · Palette generator →