#1F4480#1F4480

#1F4480 is a dark, moderate blue. Relative luminance 0.060; OKLCH L 39.4% C 0.110 H 259.6°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#1F4480
RGB	rgb(31, 68, 128)
HSL	hsl(217, 61%, 31%)
HSV	hsv(217, 76%, 50%)
CMYK	cmyk(75.8%, 46.9%, 0%, 49.8%)
CIE-LAB	lab(29.37, 9.19, -37.75)
CIE-LCH	lch(29.37, 38.85, 283.69°)
OKLab	oklab(39.4% -0.0197 -0.1081)
OKLCH	oklch(39.4% 0.11 259.6)
XYZ	xyz(6.5271, 5.9833, 21.2288)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4480 #805B1F

analogous

#1F7480 #1F4480 #2A1F80

triadic

#1F4480 #801F44 #44801F

tetradic

#1F4480 #801F74 #805B1F #1F802A

square

#1F4480 #801F74 #805B1F #1F802A

split-complementary

#1F4480 #802A1F #74801F

monochromatic

#07101D #132A4F #1F4480 #2B5EB1 #477CD2

Accessibility & contrast

On white

9.56

#1F4480 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1F4480 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4480

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4480	#FFFFFF	#000000	##FFFFFF
##1F4480	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254A82

Deuteranopia (green-blind)

#11417F

Tritanopia (blue-blind)

#00525B

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f4480;
/* rgb */ color: rgb(31, 68, 128);
/* oklch */ color: oklch(39.4% 0.110 259.6);

Tailwind

colors: {
  custom: {
    50: '#6977a5',
    500: '#1f4480',
    950: '#000000',
  },
}

SCSS

$custom: #1f4480;
$custom-light: #6977a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4480",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 128
  },
  "hsl": {
    "h": 217.113,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.39398,
    "c": 0.10993,
    "h": 259.6
  },
  "luminance": 0.05984
}

Semantic roles & 50–950 ramp

primary

#1F4480

secondary

#B38A48

accent

#A744E4

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4480

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

Preview Lab → · Contrast checker → · Palette generator →