#1B4D9B#1B4D9B

#1B4D9B is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.3% C 0.138 H 259.3°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D9B
RGB	rgb(27, 77, 155)
HSL	hsl(217, 70%, 36%)
HSV	hsv(217, 83%, 61%)
CMYK	cmyk(82.6%, 50.3%, 0%, 39.2%)
CIE-LAB	lab(33.79, 13.47, -47.21)
CIE-LCH	lch(33.79, 49.09, 285.92°)
OKLab	oklab(43.35% -0.0256 -0.1359)
OKLCH	oklch(43.35% 0.138 259.3)
XYZ	xyz(9.0201, 7.9062, 32.0546)
Luminance	0.0791 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D9B #9B691B

analogous

#1B8D9B #1B4D9B #291B9B

triadic

#1B4D9B #9B1B4D #4D9B1B

tetradic

#1B4D9B #9B1B8D #9B691B #1B9B29

square

#1B4D9B #9B1B8D #9B691B #1B9B29

split-complementary

#1B4D9B #9B291B #8D9B1B

monochromatic

#091933 #123367 #1B4D9B #2467CF #5088E0

Accessibility & contrast

On white

8.14

#1B4D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#1B4D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D9B

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D9B	#FFFFFF	#000000	##FFFFFF
##1B4D9B	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E569E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b4d9b;
/* rgb */ color: rgb(27, 77, 155);
/* oklch */ color: oklch(43.3% 0.138 259.3);

Tailwind

colors: {
  custom: {
    50: '#6e7eb9',
    500: '#1b4d9b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d9b;
$custom-light: #6e7eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d9b",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 155
  },
  "hsl": {
    "h": 216.563,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.43349,
    "c": 0.13824,
    "h": 259.3
  },
  "luminance": 0.07907
}

Semantic roles & 50–950 ramp

primary

#1B4D9B

secondary

#C3964F

accent

#A73BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4D9B

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

Preview Lab → · Contrast checker → · Palette generator →