#1F4481#1F4481

#1F4481 is a dark, moderate blue. Relative luminance 0.060; OKLCH L 39.5% C 0.111 H 259.9°. Best body text is #FFFFFF at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#1F4481
RGB	rgb(31, 68, 129)
HSL	hsl(217, 61%, 31%)
HSV	hsv(217, 76%, 51%)
CMYK	cmyk(76%, 47.3%, 0%, 49.4%)
CIE-LAB	lab(29.44, 9.59, -38.26)
CIE-LCH	lch(29.44, 39.45, 284.07°)
OKLab	oklab(39.47% -0.0196 -0.1097)
OKLCH	oklch(39.47% 0.111 259.9)
XYZ	xyz(6.5932, 6.0098, 21.5772)
Luminance	0.0601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4481 #815C1F

analogous

#1F7581 #1F4481 #2B1F81

triadic

#1F4481 #811F44 #44811F

tetradic

#1F4481 #811F75 #815C1F #1F812B

square

#1F4481 #811F75 #815C1F #1F812B

split-complementary

#1F4481 #812B1F #75811F

monochromatic

#07101E #132A50 #1F4481 #2B5EB2 #477CD3

Accessibility & contrast

On white

9.54

#1F4481 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1F4481 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4481

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4481	#FFFFFF	#000000	##FFFFFF
##1F4481	1.00	9.54	2.20	9.54
#FFFFFF	9.54	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244A83

Deuteranopia (green-blind)

#0F4180

Tritanopia (blue-blind)

#00525C

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f4481;
/* rgb */ color: rgb(31, 68, 129);
/* oklch */ color: oklch(39.5% 0.111 259.9);

Tailwind

colors: {
  custom: {
    50: '#6977a6',
    500: '#1f4481',
    950: '#000000',
  },
}

SCSS

$custom: #1f4481;
$custom-light: #6977a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4481",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 129
  },
  "hsl": {
    "h": 217.347,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.39471,
    "c": 0.11139,
    "h": 259.9
  },
  "luminance": 0.06011
}

Semantic roles & 50–950 ramp

primary

#1F4481

secondary

#B48B48

accent

#A843E4

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4481

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

Preview Lab → · Contrast checker → · Palette generator →