#1F4A9D#1F4A9D

#1F4A9D is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.0% C 0.144 H 261.8°. Best body text is #FFFFFF at 8.32:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A9D
RGB	rgb(31, 74, 157)
HSL	hsl(220, 67%, 37%)
HSV	hsv(220, 80%, 62%)
CMYK	cmyk(80.3%, 52.9%, 0%, 38.4%)
CIE-LAB	lab(33.18, 16.72, -49.39)
CIE-LCH	lch(33.18, 52.14, 288.70°)
OKLab	oklab(42.97% -0.0204 -0.1423)
OKLCH	oklch(42.97% 0.144 261.8)
XYZ	xyz(9.0975, 7.6221, 32.8835)
Luminance	0.0762 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A9D #9D721F

analogous

#1F899D #1F4A9D #331F9D

triadic

#1F4A9D #9D1F4A #4A9D1F

tetradic

#1F4A9D #9D1F89 #9D721F #1F9D33

square

#1F4A9D #9D1F89 #9D721F #1F9D33

split-complementary

#1F4A9D #9D331F #899D1F

monochromatic

#0B1A37 #15326A #1F4A9D #2962D0 #5886DE

Accessibility & contrast

On white

8.32

#1F4A9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1F4A9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A9D

8.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A9D	#FFFFFF	#000000	##FFFFFF
##1F4A9D	1.00	8.32	2.52	8.32
#FFFFFF	8.32	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1054A0

Deuteranopia (green-blind)

#00499B

Tritanopia (blue-blind)

#005E6C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f4a9d;
/* rgb */ color: rgb(31, 74, 157);
/* oklch */ color: oklch(43.0% 0.144 261.8);

Tailwind

colors: {
  custom: {
    50: '#707bbb',
    500: '#1f4a9d',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a9d;
$custom-light: #707bbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a9d",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 157
  },
  "hsl": {
    "h": 219.524,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.42969,
    "c": 0.14373,
    "h": 261.8
  },
  "luminance": 0.07623
}

Semantic roles & 50–950 ramp

primary

#1F4A9D

secondary

#C29D56

accent

#AF3EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4A9D

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

Preview Lab → · Contrast checker → · Palette generator →