#1B4D9E#1B4D9E

#1B4D9E is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.6% C 0.142 H 259.8°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D9E
RGB	rgb(27, 77, 158)
HSL	hsl(217, 71%, 36%)
HSV	hsv(217, 83%, 62%)
CMYK	cmyk(82.9%, 51.3%, 0%, 38%)
CIE-LAB	lab(34.00, 14.68, -48.67)
CIE-LCH	lch(34.00, 50.84, 286.78°)
OKLab	oklab(43.58% -0.0251 -0.1402)
OKLCH	oklch(43.58% 0.142 259.8)
XYZ	xyz(9.2752, 8.0083, 33.3980)
Luminance	0.0801 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D9E #9E6C1B

analogous

#1B8F9E #1B4D9E #2A1B9E

triadic

#1B4D9E #9E1B4D #4D9E1B

tetradic

#1B4D9E #9E1B8F #9E6C1B #1B9E2A

square

#1B4D9E #9E1B8F #9E6C1B #1B9E2A

split-complementary

#1B4D9E #9E2A1B #8F9E1B

monochromatic

#091A35 #12346A #1B4D9E #2466D2 #5289E1

Accessibility & contrast

On white

8.07

#1B4D9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#1B4D9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D9E

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D9E	#FFFFFF	#000000	##FFFFFF
##1B4D9E	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1956A1

Deuteranopia (green-blind)

#004A9C

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4d9e;
/* rgb */ color: rgb(27, 77, 158);
/* oklch */ color: oklch(43.6% 0.142 259.8);

Tailwind

colors: {
  custom: {
    50: '#6e7ebb',
    500: '#1b4d9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d9e;
$custom-light: #6e7ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d9e",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 158
  },
  "hsl": {
    "h": 217.099,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43581,
    "c": 0.1424,
    "h": 259.8
  },
  "luminance": 0.08009
}

Semantic roles & 50–950 ramp

primary

#1B4D9E

secondary

#C49851

accent

#A93AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4D9E

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

Preview Lab → · Contrast checker → · Palette generator →