#1B4A90#1B4A90

#1B4A90 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 41.8% C 0.127 H 258.6°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A90
RGB	rgb(27, 74, 144)
HSL	hsl(216, 68%, 34%)
HSV	hsv(216, 81%, 56%)
CMYK	cmyk(81.3%, 48.6%, 0%, 43.5%)
CIE-LAB	lab(32.13, 11.05, -43.19)
CIE-LCH	lch(32.13, 44.58, 284.35°)
OKLab	oklab(41.83% -0.0249 -0.1241)
OKLCH	oklch(41.83% 0.127 258.6)
XYZ	xyz(7.9330, 7.1432, 27.3408)
Luminance	0.0714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A90 #90611B

analogous

#1B8490 #1B4A90 #261B90

triadic

#1B4A90 #901B4A #4A901B

tetradic

#1B4A90 #901B84 #90611B #1B9026

square

#1B4A90 #901B84 #90611B #1B9026

split-complementary

#1B4A90 #90261B #84901B

monochromatic

#081529 #11305C #1B4A90 #2564C4 #4984DD

Accessibility & contrast

On white

8.65

#1B4A90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1B4A90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A90

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A90	#FFFFFF	#000000	##FFFFFF
##1B4A90	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#235193

Deuteranopia (green-blind)

#00478F

Tritanopia (blue-blind)

#005B66

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4a90;
/* rgb */ color: rgb(27, 74, 144);
/* oklch */ color: oklch(41.8% 0.127 258.6);

Tailwind

colors: {
  custom: {
    50: '#6b7bb1',
    500: '#1b4a90',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a90;
$custom-light: #6b7bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a90",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 144
  },
  "hsl": {
    "h": 215.897,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.41832,
    "c": 0.12659,
    "h": 258.6
  },
  "luminance": 0.07144
}

Semantic roles & 50–950 ramp

primary

#1B4A90

secondary

#BF8F48

accent

#A53DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080911

muted

#7A7B80

Preview Lab

Preview with #1B4A90

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

Preview Lab → · Contrast checker → · Palette generator →