#1B488D#1B488D

#1B488D is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.1% C 0.125 H 259.0°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B488D
RGB	rgb(27, 72, 141)
HSL	hsl(216, 68%, 33%)
HSV	hsv(216, 81%, 55%)
CMYK	cmyk(80.9%, 48.9%, 0%, 44.7%)
CIE-LAB	lab(31.32, 11.19, -42.65)
CIE-LCH	lch(31.32, 44.10, 284.70°)
OKLab	oklab(41.15% -0.0238 -0.1226)
OKLCH	oklch(41.15% 0.125 259)
XYZ	xyz(7.5753, 6.7899, 26.1055)
Luminance	0.0679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B488D #8D601B

analogous

#1B818D #1B488D #271B8D

triadic

#1B488D #8D1B48 #488D1B

tetradic

#1B488D #8D1B81 #8D601B #1B8D27

square

#1B488D #8D1B81 #8D601B #1B8D27

split-complementary

#1B488D #8D271B #818D1B

monochromatic

#071426 #112E5A #1B488D #2562C0 #4782DC

Accessibility & contrast

On white

8.91

#1B488D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1B488D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B488D

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B488D	#FFFFFF	#000000	##FFFFFF
##1B488D	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214F90

Deuteranopia (green-blind)

#00458C

Tritanopia (blue-blind)

#005963

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b488d;
/* rgb */ color: rgb(27, 72, 141);
/* oklch */ color: oklch(41.1% 0.125 259.0);

Tailwind

colors: {
  custom: {
    50: '#6a7aaf',
    500: '#1b488d',
    950: '#000000',
  },
}

SCSS

$custom: #1b488d;
$custom-light: #6a7aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b488d",
  "rgb": {
    "r": 27,
    "g": 72,
    "b": 141
  },
  "hsl": {
    "h": 216.316,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.41145,
    "c": 0.12485,
    "h": 259
  },
  "luminance": 0.06791
}

Semantic roles & 50–950 ramp

primary

#1B488D

secondary

#BD8E46

accent

#A63DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1B488D

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

Preview Lab → · Contrast checker → · Palette generator →