#1B499B#1B499B

#1B499B is a dark, vivid blue. Relative luminance 0.074; OKLCH L 42.5% C 0.143 H 260.9°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B499B
RGB	rgb(27, 73, 155)
HSL	hsl(218, 70%, 36%)
HSV	hsv(218, 83%, 61%)
CMYK	cmyk(82.6%, 52.9%, 0%, 39.2%)
CIE-LAB	lab(32.62, 16.18, -49.09)
CIE-LCH	lch(32.62, 51.69, 288.25°)
OKLab	oklab(42.46% -0.0225 -0.1415)
OKLCH	oklch(42.46% 0.143 260.9)
XYZ	xyz(8.7488, 7.3636, 31.9642)
Luminance	0.0736 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B499B #9B6D1B

analogous

#1B899B #1B499B #2D1B9B

triadic

#1B499B #9B1B49 #499B1B

tetradic

#1B499B #9B1B89 #9B6D1B #1B9B2D

square

#1B499B #9B1B89 #9B6D1B #1B9B2D

split-complementary

#1B499B #9B2D1B #899B1B

monochromatic

#091833 #123067 #1B499B #2462CF #5084E0

Accessibility & contrast

On white

8.49

#1B499B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1B499B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B499B

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B499B	#FFFFFF	#000000	##FFFFFF
##1B499B	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F539E

Deuteranopia (green-blind)

#004799

Tritanopia (blue-blind)

#005D6B

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b499b;
/* rgb */ color: rgb(27, 73, 155);
/* oklch */ color: oklch(42.5% 0.143 260.9);

Tailwind

colors: {
  custom: {
    50: '#6e7bb9',
    500: '#1b499b',
    950: '#000000',
  },
}

SCSS

$custom: #1b499b;
$custom-light: #6e7bb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b499b",
  "rgb": {
    "r": 27,
    "g": 73,
    "b": 155
  },
  "hsl": {
    "h": 218.438,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.42458,
    "c": 0.14327,
    "h": 260.9
  },
  "luminance": 0.07365
}

Semantic roles & 50–950 ramp

primary

#1B499B

secondary

#C3994F

accent

#AD3BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B499B

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

Preview Lab → · Contrast checker → · Palette generator →