#1F4789#1F4789

#1F4789 is a dark, moderate blue. Relative luminance 0.066; OKLCH L 40.8% C 0.119 H 259.9°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F4789
RGB	rgb(31, 71, 137)
HSL	hsl(217, 63%, 33%)
HSV	hsv(217, 77%, 54%)
CMYK	cmyk(77.4%, 48.2%, 0%, 46.3%)
CIE-LAB	lab(30.89, 10.75, -40.89)
CIE-LCH	lch(30.89, 42.28, 284.73°)
OKLab	oklab(40.76% -0.0209 -0.1173)
OKLCH	oklch(40.76% 0.119 259.9)
XYZ	xyz(7.3320, 6.6031, 24.5502)
Luminance	0.0660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4789 #89611F

analogous

#1F7C89 #1F4789 #2C1F89

triadic

#1F4789 #891F47 #47891F

tetradic

#1F4789 #891F7C #89611F #1F892C

square

#1F4789 #891F7C #89611F #1F892C

split-complementary

#1F4789 #892C1F #7C891F

monochromatic

#081325 #142D57 #1F4789 #2A61BB #4C80D6

Accessibility & contrast

On white

9.05

#1F4789 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1F4789 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4789

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4789	#FFFFFF	#000000	##FFFFFF
##1F4789	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234E8B

Deuteranopia (green-blind)

#074488

Tritanopia (blue-blind)

#005761

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f4789;
/* rgb */ color: rgb(31, 71, 137);
/* oklch */ color: oklch(40.8% 0.119 259.9);

Tailwind

colors: {
  custom: {
    50: '#6b79ac',
    500: '#1f4789',
    950: '#000000',
  },
}

SCSS

$custom: #1f4789;
$custom-light: #6b79ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4789",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 137
  },
  "hsl": {
    "h": 217.358,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.40759,
    "c": 0.11918,
    "h": 259.9
  },
  "luminance": 0.06604
}

Semantic roles & 50–950 ramp

primary

#1F4789

secondary

#B98F4B

accent

#A842E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4789

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

Preview Lab → · Contrast checker → · Palette generator →