#1B4A9D#1B4A9D

#1B4A9D is a dark, vivid blue. Relative luminance 0.076; OKLCH L 42.8% C 0.145 H 260.8°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A9D
RGB	rgb(27, 74, 157)
HSL	hsl(218, 71%, 36%)
HSV	hsv(218, 83%, 62%)
CMYK	cmyk(82.8%, 52.9%, 0%, 38.4%)
CIE-LAB	lab(33.06, 16.31, -49.60)
CIE-LCH	lch(33.06, 52.21, 288.20°)
OKLab	oklab(42.84% -0.023 -0.1429)
OKLCH	oklch(42.84% 0.145 260.8)
XYZ	xyz(8.9844, 7.5638, 32.8782)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A9D #9D6E1B

analogous

#1B8B9D #1B4A9D #2D1B9D

triadic

#1B4A9D #9D1B4A #4A9D1B

tetradic

#1B4A9D #9D1B8B #9D6E1B #1B9D2D

square

#1B4A9D #9D1B8B #9D6E1B #1B9D2D

split-complementary

#1B4A9D #9D2D1B #8B9D1B

monochromatic

#091935 #123169 #1B4A9D #2463D1 #5185E1

Accessibility & contrast

On white

8.36

#1B4A9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B4A9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A9D

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A9D	#FFFFFF	#000000	##FFFFFF
##1B4A9D	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F54A0

Deuteranopia (green-blind)

#00489B

Tritanopia (blue-blind)

#005E6C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4a9d;
/* rgb */ color: rgb(27, 74, 157);
/* oklch */ color: oklch(42.8% 0.145 260.8);

Tailwind

colors: {
  custom: {
    50: '#6e7bbb',
    500: '#1b4a9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a9d;
$custom-light: #6e7bbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a9d",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 157
  },
  "hsl": {
    "h": 218.308,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.42838,
    "c": 0.14479,
    "h": 260.8
  },
  "luminance": 0.07565
}

Semantic roles & 50–950 ramp

primary

#1B4A9D

secondary

#C49A50

accent

#AD3AED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080912

muted

#7B7B81

Preview Lab

Preview with #1B4A9D

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

Preview Lab → · Contrast checker → · Palette generator →