#1F519D#1F519D

#1F519D is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.5% C 0.135 H 258.9°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F519D
RGB	rgb(31, 81, 157)
HSL	hsl(216, 67%, 37%)
HSV	hsv(216, 80%, 62%)
CMYK	cmyk(80.3%, 48.4%, 0%, 38.4%)
CIE-LAB	lab(35.22, 12.00, -46.10)
CIE-LCH	lch(35.22, 47.63, 284.59°)
OKLab	oklab(44.53% -0.026 -0.1325)
OKLCH	oklch(44.53% 0.135 258.9)
XYZ	xyz(9.5911, 8.6094, 33.0480)
Luminance	0.0861 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F519D #9D6B1F

analogous

#1F909D #1F519D #2C1F9D

triadic

#1F519D #9D1F51 #519D1F

tetradic

#1F519D #9D1F90 #9D6B1F #1F9D2C

square

#1F519D #9D1F90 #9D6B1F #1F9D2C

split-complementary

#1F519D #9D2C1F #909D1F

monochromatic

#0B1C37 #15376A #1F519D #296BD0 #588DDE

Accessibility & contrast

On white

7.71

#1F519D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1F519D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F519D

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F519D	#FFFFFF	#000000	##FFFFFF
##1F519D	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2659A0

Deuteranopia (green-blind)

#004D9B

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f519d;
/* rgb */ color: rgb(31, 81, 157);
/* oklch */ color: oklch(44.5% 0.135 258.9);

Tailwind

colors: {
  custom: {
    50: '#6f81ba',
    500: '#1f519d',
    950: '#000000',
  },
}

SCSS

$custom: #1f519d;
$custom-light: #6f81ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f519d",
  "rgb": {
    "r": 31,
    "g": 81,
    "b": 157
  },
  "hsl": {
    "h": 216.19,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.44529,
    "c": 0.13497,
    "h": 258.9
  },
  "luminance": 0.0861
}

Semantic roles & 50–950 ramp

primary

#1F519D

secondary

#C29756

accent

#A63EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F519D

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

Preview Lab → · Contrast checker → · Palette generator →