#1B3D9D#1B3D9D

#1B3D9D is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.161 H 264.9°. Best body text is #FFFFFF at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D9D
RGB	rgb(27, 61, 157)
HSL	hsl(224, 71%, 36%)
HSV	hsv(224, 83%, 62%)
CMYK	cmyk(82.8%, 61.1%, 0%, 38.4%)
CIE-LAB	lab(29.42, 25.19, -55.51)
CIE-LCH	lch(29.42, 60.96, 294.41°)
OKLab	oklab(40.09% -0.0144 -0.1606)
OKLCH	oklch(40.09% 0.161 264.9)
XYZ	xyz(8.2044, 6.0038, 32.6182)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D9D #9D7B1B

analogous

#1B7E9D #1B3D9D #3A1B9D

triadic

#1B3D9D #9D1B3D #3D9D1B

tetradic

#1B3D9D #9D1B7E #9D7B1B #1B9D3A

square

#1B3D9D #9D1B7E #9D7B1B #1B9D3A

split-complementary

#1B3D9D #9D3A1B #7E9D1B

monochromatic

#091435 #122969 #1B3D9D #2451D1 #5177E1

Accessibility & contrast

On white

9.54

#1B3D9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1B3D9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D9D

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D9D	#FFFFFF	#000000	##FFFFFF
##1B3D9D	1.00	9.54	2.20	9.54
#FFFFFF	9.54	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA0

Deuteranopia (green-blind)

#003F9B

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3d9d;
/* rgb */ color: rgb(27, 61, 157);
/* oklch */ color: oklch(40.1% 0.161 264.9);

Tailwind

colors: {
  custom: {
    50: '#6f72bb',
    500: '#1b3d9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d9d;
$custom-light: #6f72bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d9d",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 157
  },
  "hsl": {
    "h": 224.308,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.40094,
    "c": 0.1612,
    "h": 264.9
  },
  "luminance": 0.06005
}

Semantic roles & 50–950 ramp

primary

#1B3D9D

secondary

#C4A650

accent

#BF3AED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3D9D

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

Preview Lab → · Contrast checker → · Palette generator →