#1F2583#1F2583

#1F2583 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.2% C 0.154 H 271.7°. Best body text is #FFFFFF at 12.72:1 contrast (WCAG AA passes).

Color values

HEX	#1F2583
RGB	rgb(31, 37, 131)
HSL	hsl(236, 62%, 32%)
HSV	hsv(236, 76%, 51%)
CMYK	cmyk(76.3%, 71.8%, 0%, 48.6%)
CIE-LAB	lab(21.03, 31.68, -53.19)
CIE-LCH	lch(21.03, 61.91, 300.78°)
OKLab	oklab(33.23% 0.0046 -0.1539)
OKLCH	oklch(33.23% 0.154 271.7)
XYZ	xyz(5.3220, 3.2526, 21.8157)
Luminance	0.0325 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2583 #837D1F

analogous

#1F5783 #1F2583 #4B1F83

triadic

#1F2583 #831F25 #25831F

tetradic

#1F2583 #831F57 #837D1F #1F834B

square

#1F2583 #831F57 #837D1F #1F834B

split-complementary

#1F2583 #834B1F #57831F

monochromatic

#080920 #131752 #1F2583 #2B33B4 #4951D4

Accessibility & contrast

On white

12.72

#1F2583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1F2583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2583

12.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2583	#FFFFFF	#000000	##FFFFFF
##1F2583	1.00	12.72	1.65	12.72
#FFFFFF	12.72	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003786

Deuteranopia (green-blind)

#002E81

Tritanopia (blue-blind)

#003F51

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f2583;
/* rgb */ color: rgb(31, 37, 131);
/* oklch */ color: oklch(33.2% 0.154 271.7);

Tailwind

colors: {
  custom: {
    50: '#6c60a8',
    500: '#1f2583',
    950: '#000000',
  },
}

SCSS

$custom: #1f2583;
$custom-light: #6c60a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2583",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 131
  },
  "hsl": {
    "h": 236.4,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.33229,
    "c": 0.15396,
    "h": 271.7
  },
  "luminance": 0.03253
}

Semantic roles & 50–950 ramp

primary

#1F2583

secondary

#B6AF48

accent

#DB43E5

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F2583

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

Preview Lab → · Contrast checker → · Palette generator →