#1F4788#1F4788

#1F4788 is a dark, moderate blue. Relative luminance 0.066; OKLCH L 40.7% C 0.118 H 259.7°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#1F4788
RGB	rgb(31, 71, 136)
HSL	hsl(217, 63%, 33%)
HSV	hsv(217, 77%, 53%)
CMYK	cmyk(77.2%, 47.8%, 0%, 46.7%)
CIE-LAB	lab(30.82, 10.35, -40.38)
CIE-LCH	lch(30.82, 41.69, 284.38°)
OKLab	oklab(40.69% -0.021 -0.1158)
OKLCH	oklch(40.69% 0.118 259.7)
XYZ	xyz(7.2606, 6.5745, 24.1741)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4788 #88601F

analogous

#1F7B88 #1F4788 #2C1F88

triadic

#1F4788 #881F47 #47881F

tetradic

#1F4788 #881F7B #88601F #1F882C

square

#1F4788 #881F7B #88601F #1F882C

split-complementary

#1F4788 #882C1F #7B881F

monochromatic

#081324 #142D56 #1F4788 #2A61BA #4B80D6

Accessibility & contrast

On white

9.07

#1F4788 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1F4788 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4788

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4788	#FFFFFF	#000000	##FFFFFF
##1F4788	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244E8A

Deuteranopia (green-blind)

#0A4487

Tritanopia (blue-blind)

#005661

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1f4788;
/* rgb */ color: rgb(31, 71, 136);
/* oklch */ color: oklch(40.7% 0.118 259.7);

Tailwind

colors: {
  custom: {
    50: '#6b79ab',
    500: '#1f4788',
    950: '#000000',
  },
}

SCSS

$custom: #1f4788;
$custom-light: #6b79ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4788",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 136
  },
  "hsl": {
    "h": 217.143,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.40685,
    "c": 0.11774,
    "h": 259.7
  },
  "luminance": 0.06575
}

Semantic roles & 50–950 ramp

primary

#1F4788

secondary

#B98F4A

accent

#A742E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1F4788

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

Preview Lab → · Contrast checker → · Palette generator →