#1F4A8F#1F4A8F

#1F4A8F is a dark, vivid blue. Relative luminance 0.072; OKLCH L 41.9% C 0.124 H 259.6°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A8F
RGB	rgb(31, 74, 143)
HSL	hsl(217, 64%, 34%)
HSV	hsv(217, 78%, 56%)
CMYK	cmyk(78.3%, 48.3%, 0%, 43.9%)
CIE-LAB	lab(32.19, 11.12, -42.47)
CIE-LCH	lch(32.19, 43.91, 284.67°)
OKLab	oklab(41.9% -0.0225 -0.1219)
OKLCH	oklch(41.9% 0.124 259.6)
XYZ	xyz(7.9700, 7.1711, 26.9454)
Luminance	0.0717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A8F #8F641F

analogous

#1F828F #1F4A8F #2C1F8F

triadic

#1F4A8F #8F1F4A #4A8F1F

tetradic

#1F4A8F #8F1F82 #8F641F #1F8F2C

square

#1F4A8F #8F1F82 #8F641F #1F8F2C

split-complementary

#1F4A8F #8F2C1F #828F1F

monochromatic

#09162A #14305D #1F4A8F #2A64C1 #4F84D9

Accessibility & contrast

On white

8.63

#1F4A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1F4A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A8F

8.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A8F	#FFFFFF	#000000	##FFFFFF
##1F4A8F	1.00	8.63	2.43	8.63
#FFFFFF	8.63	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#245192

Deuteranopia (green-blind)

#04478E

Tritanopia (blue-blind)

#005A65

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f4a8f;
/* rgb */ color: rgb(31, 74, 143);
/* oklch */ color: oklch(41.9% 0.124 259.6);

Tailwind

colors: {
  custom: {
    50: '#6c7bb0',
    500: '#1f4a8f',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a8f;
$custom-light: #6c7bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a8f",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 143
  },
  "hsl": {
    "h": 216.964,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.41896,
    "c": 0.12398,
    "h": 259.6
  },
  "luminance": 0.07172
}

Semantic roles & 50–950 ramp

primary

#1F4A8F

secondary

#BC924E

accent

#A740E7

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #1F4A8F

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

Preview Lab → · Contrast checker → · Palette generator →