#1F4A8A#1F4A8A

#1F4A8A is a dark, moderate blue. Relative luminance 0.070; OKLCH L 41.5% C 0.117 H 258.5°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A8A
RGB	rgb(31, 74, 138)
HSL	hsl(216, 63%, 33%)
HSV	hsv(216, 78%, 54%)
CMYK	cmyk(77.5%, 46.4%, 0%, 45.9%)
CIE-LAB	lab(31.86, 9.11, -39.94)
CIE-LCH	lch(31.86, 40.97, 282.85°)
OKLab	oklab(41.53% -0.0234 -0.1145)
OKLCH	oklch(41.53% 0.117 258.5)
XYZ	xyz(7.5996, 7.0230, 24.9949)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A8A #8A5F1F

analogous

#1F7F8A #1F4A8A #291F8A

triadic

#1F4A8A #8A1F4A #4A8A1F

tetradic

#1F4A8A #8A1F7F #8A5F1F #1F8A29

square

#1F4A8A #8A1F7F #8A5F1F #1F8A29

split-complementary

#1F4A8A #8A291F #7F8A1F

monochromatic

#091426 #142F58 #1F4A8A #2A65BC #4C84D7

Accessibility & contrast

On white

8.73

#1F4A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#1F4A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A8A

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A8A	#FFFFFF	#000000	##FFFFFF
##1F4A8A	1.00	8.73	2.40	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#29508C

Deuteranopia (green-blind)

#124689

Tritanopia (blue-blind)

#005963

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f4a8a;
/* rgb */ color: rgb(31, 74, 138);
/* oklch */ color: oklch(41.5% 0.117 258.5);

Tailwind

colors: {
  custom: {
    50: '#6b7cac',
    500: '#1f4a8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a8a;
$custom-light: #6b7cac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a8a",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 138
  },
  "hsl": {
    "h": 215.888,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.41531,
    "c": 0.11685,
    "h": 258.5
  },
  "luminance": 0.07024
}

Semantic roles & 50–950 ramp

primary

#1F4A8A

secondary

#BA8D4B

accent

#A441E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4A8A

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

Preview Lab → · Contrast checker → · Palette generator →