#1F4583#1F4583

#1F4583 is a dark, moderate blue. Relative luminance 0.062; OKLCH L 39.9% C 0.113 H 259.7°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#1F4583
RGB	rgb(31, 69, 131)
HSL	hsl(217, 62%, 32%)
HSV	hsv(217, 76%, 51%)
CMYK	cmyk(76.3%, 47.3%, 0%, 48.6%)
CIE-LAB	lab(29.88, 9.71, -38.80)
CIE-LCH	lch(29.88, 40.00, 284.05°)
OKLab	oklab(39.85% -0.0201 -0.1112)
OKLCH	oklch(39.85% 0.113 259.7)
XYZ	xyz(6.7884, 6.1855, 22.3045)
Luminance	0.0619 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4583 #835D1F

analogous

#1F7783 #1F4583 #2B1F83

triadic

#1F4583 #831F45 #45831F

tetradic

#1F4583 #831F77 #835D1F #1F832B

square

#1F4583 #831F77 #835D1F #1F832B

split-complementary

#1F4583 #832B1F #77831F

monochromatic

#081120 #132B52 #1F4583 #2B5FB4 #497DD4

Accessibility & contrast

On white

9.39

#1F4583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1F4583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4583

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4583	#FFFFFF	#000000	##FFFFFF
##1F4583	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254B85

Deuteranopia (green-blind)

#0E4282

Tritanopia (blue-blind)

#00545D

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f4583;
/* rgb */ color: rgb(31, 69, 131);
/* oklch */ color: oklch(39.9% 0.113 259.7);

Tailwind

colors: {
  custom: {
    50: '#6978a7',
    500: '#1f4583',
    950: '#000000',
  },
}

SCSS

$custom: #1f4583;
$custom-light: #6978a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4583",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 131
  },
  "hsl": {
    "h": 217.2,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39851,
    "c": 0.11304,
    "h": 259.7
  },
  "luminance": 0.06186
}

Semantic roles & 50–950 ramp

primary

#1F4583

secondary

#B68C48

accent

#A743E5

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4583

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

Preview Lab → · Contrast checker → · Palette generator →