#1B4299#1B4299

#1B4299 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.8% C 0.149 H 263.2°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B4299
RGB	rgb(27, 66, 153)
HSL	hsl(221, 70%, 35%)
HSV	hsv(221, 82%, 60%)
CMYK	cmyk(82.4%, 56.9%, 0%, 40%)
CIE-LAB	lab(30.47, 20.17, -51.37)
CIE-LCH	lch(30.47, 55.19, 291.44°)
OKLab	oklab(40.78% -0.0178 -0.1483)
OKLCH	oklch(40.78% 0.149 263.2)
XYZ	xyz(8.1479, 6.4284, 30.9422)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4299 #99721B

analogous

#1B8199 #1B4299 #331B99

triadic

#1B4299 #991B42 #42991B

tetradic

#1B4299 #991B81 #99721B #1B9933

square

#1B4299 #991B81 #99721B #1B9933

split-complementary

#1B4299 #99331B #81991B

monochromatic

#091531 #122C65 #1B4299 #2458CD #4F7CE0

Accessibility & contrast

On white

9.19

#1B4299 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1B4299 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4299

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4299	#FFFFFF	#000000	##FFFFFF
##1B4299	1.00	9.19	2.29	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004E9C

Deuteranopia (green-blind)

#004297

Tritanopia (blue-blind)

#005867

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4299;
/* rgb */ color: rgb(27, 66, 153);
/* oklch */ color: oklch(40.8% 0.149 263.2);

Tailwind

colors: {
  custom: {
    50: '#6e75b8',
    500: '#1b4299',
    950: '#000000',
  },
}

SCSS

$custom: #1b4299;
$custom-light: #6e75b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4299",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 153
  },
  "hsl": {
    "h": 221.429,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.40776,
    "c": 0.14939,
    "h": 263.2
  },
  "luminance": 0.06429
}

Semantic roles & 50–950 ramp

primary

#1B4299

secondary

#C29E4E

accent

#B63BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B4299

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

Preview Lab → · Contrast checker → · Palette generator →