#1B4E9F#1B4E9F

#1B4E9F is a dark, vivid blue. Relative luminance 0.082; OKLCH L 43.9% C 0.143 H 259.6°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E9F
RGB	rgb(27, 78, 159)
HSL	hsl(217, 71%, 36%)
HSV	hsv(217, 83%, 62%)
CMYK	cmyk(83%, 50.9%, 0%, 37.6%)
CIE-LAB	lab(34.36, 14.41, -48.69)
CIE-LCH	lch(34.36, 50.78, 286.48°)
OKLab	oklab(43.88% -0.0257 -0.1402)
OKLCH	oklch(43.88% 0.143 259.6)
XYZ	xyz(9.4321, 8.1838, 33.8767)
Luminance	0.0819 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E9F #9F6C1B

analogous

#1B909F #1B4E9F #2A1B9F

triadic

#1B4E9F #9F1B4E #4E9F1B

tetradic

#1B4E9F #9F1B90 #9F6C1B #1B9F2A

square

#1B4E9F #9F1B90 #9F6C1B #1B9F2A

split-complementary

#1B4E9F #9F2A1B #909F1B

monochromatic

#091B36 #12346B #1B4E9F #2468D3 #538AE2

Accessibility & contrast

On white

7.96

#1B4E9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1B4E9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E9F

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E9F	#FFFFFF	#000000	##FFFFFF
##1B4E9F	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B57A2

Deuteranopia (green-blind)

#004B9D

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4e9f;
/* rgb */ color: rgb(27, 78, 159);
/* oklch */ color: oklch(43.9% 0.143 259.6);

Tailwind

colors: {
  custom: {
    50: '#6f7ebc',
    500: '#1b4e9f',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e9f;
$custom-light: #6f7ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e9f",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 159
  },
  "hsl": {
    "h": 216.818,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.43881,
    "c": 0.14254,
    "h": 259.6
  },
  "luminance": 0.08185
}

Semantic roles & 50–950 ramp

primary

#1B4E9F

secondary

#C59851

accent

#A83AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4E9F

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

Preview Lab → · Contrast checker → · Palette generator →