#1F4281#1F4281

#1F4281 is a dark, moderate blue. Relative luminance 0.058; OKLCH L 39.0% C 0.114 H 261.1°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#1F4281
RGB	rgb(31, 66, 129)
HSL	hsl(219, 61%, 31%)
HSV	hsv(219, 76%, 51%)
CMYK	cmyk(76%, 48.8%, 0%, 49.4%)
CIE-LAB	lab(28.83, 10.97, -39.24)
CIE-LCH	lch(28.83, 40.74, 285.62°)
OKLab	oklab(39% -0.0177 -0.1126)
OKLCH	oklch(39% 0.114 261.1)
XYZ	xyz(6.4743, 5.7720, 21.5375)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4281 #815E1F

analogous

#1F7381 #1F4281 #2D1F81

triadic

#1F4281 #811F42 #42811F

tetradic

#1F4281 #811F73 #815E1F #1F812D

square

#1F4281 #811F73 #815E1F #1F812D

split-complementary

#1F4281 #812D1F #73811F

monochromatic

#07101E #132950 #1F4281 #2B5BB2 #4779D3

Accessibility & contrast

On white

9.75

#1F4281 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1F4281 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4281

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4281	#FFFFFF	#000000	##FFFFFF
##1F4281	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204983

Deuteranopia (green-blind)

#064080

Tritanopia (blue-blind)

#00515B

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f4281;
/* rgb */ color: rgb(31, 66, 129);
/* oklch */ color: oklch(39.0% 0.114 261.1);

Tailwind

colors: {
  custom: {
    50: '#6975a6',
    500: '#1f4281',
    950: '#000000',
  },
}

SCSS

$custom: #1f4281;
$custom-light: #6975a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4281",
  "rgb": {
    "r": 31,
    "g": 66,
    "b": 129
  },
  "hsl": {
    "h": 218.571,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.39003,
    "c": 0.11395,
    "h": 261.1
  },
  "luminance": 0.05773
}

Semantic roles & 50–950 ramp

primary

#1F4281

secondary

#B48D48

accent

#AB43E4

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4281

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

Preview Lab → · Contrast checker → · Palette generator →