#1F4A8D#1F4A8D

#1F4A8D is a dark, vivid blue. Relative luminance 0.071; OKLCH L 41.7% C 0.121 H 259.1°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A8D
RGB	rgb(31, 74, 141)
HSL	hsl(217, 64%, 34%)
HSV	hsv(217, 78%, 55%)
CMYK	cmyk(78%, 47.5%, 0%, 44.7%)
CIE-LAB	lab(32.06, 10.32, -41.47)
CIE-LCH	lch(32.06, 42.73, 283.97°)
OKLab	oklab(41.75% -0.0228 -0.119)
OKLCH	oklch(41.75% 0.121 259.1)
XYZ	xyz(7.8198, 7.1111, 26.1546)
Luminance	0.0711 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A8D #8D621F

analogous

#1F818D #1F4A8D #2B1F8D

triadic

#1F4A8D #8D1F4A #4A8D1F

tetradic

#1F4A8D #8D1F81 #8D621F #1F8D2B

square

#1F4A8D #8D1F81 #8D621F #1F8D2B

split-complementary

#1F4A8D #8D2B1F #818D1F

monochromatic

#091529 #14305B #1F4A8D #2A64BF #4E84D8

Accessibility & contrast

On white

8.67

#1F4A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#1F4A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A8D

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A8D	#FFFFFF	#000000	##FFFFFF
##1F4A8D	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#265190

Deuteranopia (green-blind)

#0B478C

Tritanopia (blue-blind)

#005A64

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f4a8d;
/* rgb */ color: rgb(31, 74, 141);
/* oklch */ color: oklch(41.7% 0.121 259.1);

Tailwind

colors: {
  custom: {
    50: '#6c7caf',
    500: '#1f4a8d',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a8d;
$custom-light: #6c7caf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a8d",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 141
  },
  "hsl": {
    "h": 216.545,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.41748,
    "c": 0.12114,
    "h": 259.1
  },
  "luminance": 0.07112
}

Semantic roles & 50–950 ramp

primary

#1F4A8D

secondary

#BB904D

accent

#A641E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4A8D

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

Preview Lab → · Contrast checker → · Palette generator →