#1F4580#1F4580

#1F4580 is a dark, moderate blue. Relative luminance 0.061; OKLCH L 39.6% C 0.109 H 259.0°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#1F4580
RGB	rgb(31, 69, 128)
HSL	hsl(216, 61%, 31%)
HSV	hsv(216, 76%, 50%)
CMYK	cmyk(75.8%, 46.1%, 0%, 49.8%)
CIE-LAB	lab(29.68, 8.51, -37.26)
CIE-LCH	lch(29.68, 38.21, 282.86°)
OKLab	oklab(39.63% -0.0207 -0.1067)
OKLCH	oklch(39.63% 0.109 259)
XYZ	xyz(6.5881, 6.1053, 21.2491)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4580 #805A1F

analogous

#1F7580 #1F4580 #291F80

triadic

#1F4580 #801F45 #45801F

tetradic

#1F4580 #801F75 #805A1F #1F8029

square

#1F4580 #801F75 #805A1F #1F8029

split-complementary

#1F4580 #80291F #75801F

monochromatic

#07101D #132A4F #1F4580 #2B60B1 #477ED2

Accessibility & contrast

On white

9.45

#1F4580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F4580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4580

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4580	#FFFFFF	#000000	##FFFFFF
##1F4580	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274B82

Deuteranopia (green-blind)

#14427F

Tritanopia (blue-blind)

#00535C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f4580;
/* rgb */ color: rgb(31, 69, 128);
/* oklch */ color: oklch(39.6% 0.109 259.0);

Tailwind

colors: {
  custom: {
    50: '#6978a5',
    500: '#1f4580',
    950: '#000000',
  },
}

SCSS

$custom: #1f4580;
$custom-light: #6978a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4580",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 128
  },
  "hsl": {
    "h": 216.495,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.39634,
    "c": 0.10867,
    "h": 259
  },
  "luminance": 0.06106
}

Semantic roles & 50–950 ramp

primary

#1F4580

secondary

#B38948

accent

#A544E4

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4580

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

Preview Lab → · Contrast checker → · Palette generator →