#1B4D9F#1B4D9F

#1B4D9F is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.7% C 0.144 H 260.0°. Best body text is #FFFFFF at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D9F
RGB	rgb(27, 77, 159)
HSL	hsl(217, 71%, 36%)
HSV	hsv(217, 83%, 62%)
CMYK	cmyk(83%, 51.6%, 0%, 37.6%)
CIE-LAB	lab(34.07, 15.08, -49.16)
CIE-LCH	lch(34.07, 51.42, 287.06°)
OKLab	oklab(43.66% -0.025 -0.1416)
OKLCH	oklch(43.66% 0.144 260)
XYZ	xyz(9.3616, 8.0428, 33.8532)
Luminance	0.0804 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D9F #9F6D1B

analogous

#1B8F9F #1B4D9F #2B1B9F

triadic

#1B4D9F #9F1B4D #4D9F1B

tetradic

#1B4D9F #9F1B8F #9F6D1B #1B9F2B

square

#1B4D9F #9F1B8F #9F6D1B #1B9F2B

split-complementary

#1B4D9F #9F2B1B #8F9F1B

monochromatic

#091A36 #12346B #1B4D9F #2466D3 #5389E2

Accessibility & contrast

On white

8.05

#1B4D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1B4D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D9F

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D9F	#FFFFFF	#000000	##FFFFFF
##1B4D9F	1.00	8.05	2.61	8.05
#FFFFFF	8.05	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1756A2

Deuteranopia (green-blind)

#004B9D

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4d9f;
/* rgb */ color: rgb(27, 77, 159);
/* oklch */ color: oklch(43.7% 0.144 260.0);

Tailwind

colors: {
  custom: {
    50: '#6f7ebc',
    500: '#1b4d9f',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d9f;
$custom-light: #6f7ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d9f",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 159
  },
  "hsl": {
    "h": 217.273,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.43658,
    "c": 0.14379,
    "h": 260
  },
  "luminance": 0.08044
}

Semantic roles & 50–950 ramp

primary

#1B4D9F

secondary

#C59951

accent

#AA3AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4D9F

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

Preview Lab → · Contrast checker → · Palette generator →