#1B4B99#1B4B99

#1B4B99 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 42.7% C 0.138 H 259.9°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B99
RGB	rgb(27, 75, 153)
HSL	hsl(217, 70%, 35%)
HSV	hsv(217, 82%, 60%)
CMYK	cmyk(82.4%, 51%, 0%, 40%)
CIE-LAB	lab(33.06, 14.02, -47.18)
CIE-LCH	lch(33.06, 49.21, 286.55°)
OKLab	oklab(42.75% -0.0243 -0.1358)
OKLCH	oklch(42.75% 0.138 259.9)
XYZ	xyz(8.7157, 7.5640, 31.1315)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B99 #99691B

analogous

#1B8A99 #1B4B99 #2A1B99

triadic

#1B4B99 #991B4B #4B991B

tetradic

#1B4B99 #991B8A #99691B #1B992A

square

#1B4B99 #991B8A #99691B #1B992A

split-complementary

#1B4B99 #992A1B #8A991B

monochromatic

#091831 #123165 #1B4B99 #2464CD #4F86E0

Accessibility & contrast

On white

8.36

#1B4B99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B4B99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B99

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B99	#FFFFFF	#000000	##FFFFFF
##1B4B99	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)

#1A549C

Deuteranopia (green-blind)

#004897

Tritanopia (blue-blind)

#005E6A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4b99;
/* rgb */ color: rgb(27, 75, 153);
/* oklch */ color: oklch(42.7% 0.138 259.9);

Tailwind

colors: {
  custom: {
    50: '#6d7cb8',
    500: '#1b4b99',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b99;
$custom-light: #6d7cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b99",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 153
  },
  "hsl": {
    "h": 217.143,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.42746,
    "c": 0.13796,
    "h": 259.9
  },
  "luminance": 0.07565
}

Semantic roles & 50–950 ramp

primary

#1B4B99

secondary

#C2964E

accent

#A93BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4B99

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

Preview Lab → · Contrast checker → · Palette generator →