#1F4A9C#1F4A9C

#1F4A9C is a dark, vivid blue. Relative luminance 0.076; OKLCH L 42.9% C 0.142 H 261.7°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A9C
RGB	rgb(31, 74, 156)
HSL	hsl(219, 67%, 37%)
HSV	hsv(219, 80%, 61%)
CMYK	cmyk(80.1%, 52.6%, 0%, 38.8%)
CIE-LAB	lab(33.11, 16.32, -48.90)
CIE-LCH	lch(33.11, 51.55, 288.46°)
OKLab	oklab(42.89% -0.0206 -0.1408)
OKLCH	oklch(42.89% 0.142 261.7)
XYZ	xyz(9.0124, 7.5881, 32.4357)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A9C #9C711F

analogous

#1F899C #1F4A9C #331F9C

triadic

#1F4A9C #9C1F4A #4A9C1F

tetradic

#1F4A9C #9C1F89 #9C711F #1F9C33

square

#1F4A9C #9C1F89 #9C711F #1F9C33

split-complementary

#1F4A9C #9C331F #899C1F

monochromatic

#0B1A36 #153269 #1F4A9C #2962CF #5886DE

Accessibility & contrast

On white

8.34

#1F4A9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1F4A9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A9C

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A9C	#FFFFFF	#000000	##FFFFFF
##1F4A9C	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12549F

Deuteranopia (green-blind)

#00489A

Tritanopia (blue-blind)

#005E6B

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f4a9c;
/* rgb */ color: rgb(31, 74, 156);
/* oklch */ color: oklch(42.9% 0.142 261.7);

Tailwind

colors: {
  custom: {
    50: '#6f7bba',
    500: '#1f4a9c',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a9c;
$custom-light: #6f7bba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a9c",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 156
  },
  "hsl": {
    "h": 219.36,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.4289,
    "c": 0.14233,
    "h": 261.7
  },
  "luminance": 0.07589
}

Semantic roles & 50–950 ramp

primary

#1F4A9C

secondary

#C19C55

accent

#AF3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4A9C

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

Preview Lab → · Contrast checker → · Palette generator →