#1B519F#1B519F

#1B519F is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.6% C 0.139 H 258.4°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B519F
RGB	rgb(27, 81, 159)
HSL	hsl(215, 71%, 36%)
HSV	hsv(215, 83%, 62%)
CMYK	cmyk(83%, 49.1%, 0%, 37.6%)
CIE-LAB	lab(35.24, 12.39, -47.27)
CIE-LCH	lch(35.24, 48.87, 284.68°)
OKLab	oklab(44.56% -0.028 -0.136)
OKLCH	oklch(44.56% 0.139 258.4)
XYZ	xyz(9.6501, 8.6199, 33.9494)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B519F #9F691B

analogous

#1B939F #1B519F #271B9F

triadic

#1B519F #9F1B51 #519F1B

tetradic

#1B519F #9F1B93 #9F691B #1B9F27

square

#1B519F #9F1B93 #9F691B #1B9F27

split-complementary

#1B519F #9F271B #939F1B

monochromatic

#091C36 #12366B #1B519F #246CD3 #538DE2

Accessibility & contrast

On white

7.71

#1B519F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1B519F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B519F

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B519F	#FFFFFF	#000000	##FFFFFF
##1B519F	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)

#2459A2

Deuteranopia (green-blind)

#004D9D

Tritanopia (blue-blind)

#006470

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b519f;
/* rgb */ color: rgb(27, 81, 159);
/* oklch */ color: oklch(44.6% 0.139 258.4);

Tailwind

colors: {
  custom: {
    50: '#6f81bc',
    500: '#1b519f',
    950: '#000000',
  },
}

SCSS

$custom: #1b519f;
$custom-light: #6f81bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b519f",
  "rgb": {
    "r": 27,
    "g": 81,
    "b": 159
  },
  "hsl": {
    "h": 215.455,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.44556,
    "c": 0.13882,
    "h": 258.4
  },
  "luminance": 0.08621
}

Semantic roles & 50–950 ramp

primary

#1B519F

secondary

#C59551

accent

#A43AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1B519F

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

Preview Lab → · Contrast checker → · Palette generator →