#1B448B#1B448B

#1B448B is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.1% C 0.127 H 260.6°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#1B448B
RGB	rgb(27, 68, 139)
HSL	hsl(218, 67%, 33%)
HSV	hsv(218, 81%, 55%)
CMYK	cmyk(80.6%, 51.1%, 0%, 45.5%)
CIE-LAB	lab(29.99, 13.12, -43.58)
CIE-LCH	lch(29.99, 45.51, 286.76°)
OKLab	oklab(40.07% -0.0208 -0.1254)
OKLCH	oklch(40.07% 0.127 260.6)
XYZ	xyz(7.1776, 6.2305, 25.2454)
Luminance	0.0623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B448B #8B621B

analogous

#1B7C8B #1B448B #2A1B8B

triadic

#1B448B #8B1B44 #448B1B

tetradic

#1B448B #8B1B7C #8B621B #1B8B2A

square

#1B448B #8B1B7C #8B621B #1B8B2A

split-complementary

#1B448B #8B2A1B #7C8B1B

monochromatic

#071225 #112B58 #1B448B #255DBE #457CDB

Accessibility & contrast

On white

9.35

#1B448B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1B448B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B448B

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B448B	#FFFFFF	#000000	##FFFFFF
##1B448B	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194C8E

Deuteranopia (green-blind)

#00428A

Tritanopia (blue-blind)

#005561

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b448b;
/* rgb */ color: rgb(27, 68, 139);
/* oklch */ color: oklch(40.1% 0.127 260.6);

Tailwind

colors: {
  custom: {
    50: '#6a77ad',
    500: '#1b448b',
    950: '#000000',
  },
}

SCSS

$custom: #1b448b;
$custom-light: #6a77ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b448b",
  "rgb": {
    "r": 27,
    "g": 68,
    "b": 139
  },
  "hsl": {
    "h": 218.036,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.40074,
    "c": 0.12709,
    "h": 260.6
  },
  "luminance": 0.06231
}

Semantic roles & 50–950 ramp

primary

#1B448B

secondary

#BC9145

accent

#AB3DEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B448B

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

Preview Lab → · Contrast checker → · Palette generator →