#1F519B#1F519B

#1F519B is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.4% C 0.132 H 258.5°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#1F519B
RGB	rgb(31, 81, 155)
HSL	hsl(216, 67%, 36%)
HSV	hsv(216, 80%, 61%)
CMYK	cmyk(80%, 47.7%, 0%, 39.2%)
CIE-LAB	lab(35.09, 11.20, -45.11)
CIE-LCH	lch(35.09, 46.48, 283.95°)
OKLab	oklab(44.38% -0.0263 -0.1295)
OKLCH	oklch(44.38% 0.132 258.5)
XYZ	xyz(9.4217, 8.5416, 32.1561)
Luminance	0.0854 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F519B #9B691F

analogous

#1F8F9B #1F519B #2B1F9B

triadic

#1F519B #9B1F51 #519B1F

tetradic

#1F519B #9B1F8F #9B691F #1F9B2B

square

#1F519B #9B1F8F #9B691F #1F9B2B

split-complementary

#1F519B #9B2B1F #8F9B1F

monochromatic

#0B1C35 #153668 #1F519B #296CCE #578DDD

Accessibility & contrast

On white

7.75

#1F519B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1F519B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F519B

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F519B	#FFFFFF	#000000	##FFFFFF
##1F519B	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28599E

Deuteranopia (green-blind)

#044D9A

Tritanopia (blue-blind)

#00636E

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f519b;
/* rgb */ color: rgb(31, 81, 155);
/* oklch */ color: oklch(44.4% 0.132 258.5);

Tailwind

colors: {
  custom: {
    50: '#6f81b9',
    500: '#1f519b',
    950: '#000000',
  },
}

SCSS

$custom: #1f519b;
$custom-light: #6f81b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f519b",
  "rgb": {
    "r": 31,
    "g": 81,
    "b": 155
  },
  "hsl": {
    "h": 215.806,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.44382,
    "c": 0.13219,
    "h": 258.5
  },
  "luminance": 0.08543
}

Semantic roles & 50–950 ramp

primary

#1F519B

secondary

#C19555

accent

#A43EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F519B

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

Preview Lab → · Contrast checker → · Palette generator →