#1B448F#1B448F

#1B448F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.4% C 0.133 H 261.2°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B448F
RGB	rgb(27, 68, 143)
HSL	hsl(219, 68%, 33%)
HSV	hsv(219, 81%, 56%)
CMYK	cmyk(81.1%, 52.4%, 0%, 43.9%)
CIE-LAB	lab(30.28, 14.75, -45.57)
CIE-LCH	lch(30.28, 47.90, 287.94°)
OKLab	oklab(40.39% -0.0203 -0.1312)
OKLCH	oklch(40.39% 0.133 261.2)
XYZ	xyz(7.4752, 6.3495, 26.8129)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B448F #8F661B

analogous

#1B7E8F #1B448F #2C1B8F

triadic

#1B448F #8F1B44 #448F1B

tetradic

#1B448F #8F1B7E #8F661B #1B8F2C

square

#1B448F #8F1B7E #8F661B #1B8F2C

split-complementary

#1B448F #8F2C1B #7E8F1B

monochromatic

#081328 #112C5C #1B448F #255CC2 #487CDC

Accessibility & contrast

On white

9.25

#1B448F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1B448F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B448F

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B448F	#FFFFFF	#000000	##FFFFFF
##1B448F	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124D92

Deuteranopia (green-blind)

#00428E

Tritanopia (blue-blind)

#005663

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b448f;
/* rgb */ color: rgb(27, 68, 143);
/* oklch */ color: oklch(40.4% 0.133 261.2);

Tailwind

colors: {
  custom: {
    50: '#6b77b0',
    500: '#1b448f',
    950: '#000000',
  },
}

SCSS

$custom: #1b448f;
$custom-light: #6b77b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b448f",
  "rgb": {
    "r": 27,
    "g": 68,
    "b": 143
  },
  "hsl": {
    "h": 218.793,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.40389,
    "c": 0.13278,
    "h": 261.2
  },
  "luminance": 0.0635
}

Semantic roles & 50–950 ramp

primary

#1B448F

secondary

#BE9448

accent

#AD3DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080811

muted

#7A7B80

Preview Lab

Preview with #1B448F

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

Preview Lab → · Contrast checker → · Palette generator →