#1F4787#1F4787

#1F4787 is a dark, moderate blue. Relative luminance 0.065; OKLCH L 40.6% C 0.116 H 259.5°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F4787
RGB	rgb(31, 71, 135)
HSL	hsl(217, 63%, 33%)
HSV	hsv(217, 77%, 53%)
CMYK	cmyk(77%, 47.4%, 0%, 47.1%)
CIE-LAB	lab(30.75, 9.95, -39.87)
CIE-LCH	lch(30.75, 41.10, 284.01°)
OKLab	oklab(40.61% -0.0212 -0.1143)
OKLCH	oklch(40.61% 0.116 259.5)
XYZ	xyz(7.1899, 6.5462, 23.8016)
Luminance	0.0655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4787 #875F1F

analogous

#1F7B87 #1F4787 #2B1F87

triadic

#1F4787 #871F47 #47871F

tetradic

#1F4787 #871F7B #875F1F #1F872B

square

#1F4787 #871F7B #875F1F #1F872B

split-complementary

#1F4787 #872B1F #7B871F

monochromatic

#081323 #142D55 #1F4787 #2A61B9 #4B80D6

Accessibility & contrast

On white

9.09

#1F4787 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1F4787 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4787

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4787	#FFFFFF	#000000	##FFFFFF
##1F4787	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254D89

Deuteranopia (green-blind)

#0D4486

Tritanopia (blue-blind)

#005660

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f4787;
/* rgb */ color: rgb(31, 71, 135);
/* oklch */ color: oklch(40.6% 0.116 259.5);

Tailwind

colors: {
  custom: {
    50: '#6a79aa',
    500: '#1f4787',
    950: '#000000',
  },
}

SCSS

$custom: #1f4787;
$custom-light: #6a79aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4787",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 135
  },
  "hsl": {
    "h": 216.923,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.40612,
    "c": 0.11629,
    "h": 259.5
  },
  "luminance": 0.06547
}

Semantic roles & 50–950 ramp

primary

#1F4787

secondary

#B88E4A

accent

#A742E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1F4787

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

Preview Lab → · Contrast checker → · Palette generator →