#1F4A9F#1F4A9F

#1F4A9F is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.1% C 0.147 H 262.1°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A9F
RGB	rgb(31, 74, 159)
HSL	hsl(220, 67%, 37%)
HSV	hsv(220, 81%, 62%)
CMYK	cmyk(80.5%, 53.5%, 0%, 37.6%)
CIE-LAB	lab(33.33, 17.52, -50.35)
CIE-LCH	lch(33.33, 53.31, 289.18°)
OKLab	oklab(43.13% -0.0202 -0.1451)
OKLCH	oklch(43.13% 0.147 262.1)
XYZ	xyz(9.2696, 7.6910, 33.7901)
Luminance	0.0769 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A9F #9F741F

analogous

#1F8A9F #1F4A9F #341F9F

triadic

#1F4A9F #9F1F4A #4A9F1F

tetradic

#1F4A9F #9F1F8A #9F741F #1F9F34

square

#1F4A9F #9F1F8A #9F741F #1F9F34

split-complementary

#1F4A9F #9F341F #8A9F1F

monochromatic

#0B1A39 #15326C #1F4A9F #2962D2 #5A86DF

Accessibility & contrast

On white

8.27

#1F4A9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#1F4A9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A9F

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A9F	#FFFFFF	#000000	##FFFFFF
##1F4A9F	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A55A2

Deuteranopia (green-blind)

#00499D

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f4a9f;
/* rgb */ color: rgb(31, 74, 159);
/* oklch */ color: oklch(43.1% 0.147 262.1);

Tailwind

colors: {
  custom: {
    50: '#707bbc',
    500: '#1f4a9f',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a9f;
$custom-light: #707bbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a9f",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 159
  },
  "hsl": {
    "h": 219.844,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.43128,
    "c": 0.14652,
    "h": 262.1
  },
  "luminance": 0.07692
}

Semantic roles & 50–950 ramp

primary

#1F4A9F

secondary

#C39F57

accent

#B03EEA

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4A9F

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

Preview Lab → · Contrast checker → · Palette generator →