#1B398D#1B398D

#1B398D is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.144 H 265.1°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B398D
RGB	rgb(27, 57, 141)
HSL	hsl(224, 68%, 33%)
HSV	hsv(224, 81%, 55%)
CMYK	cmyk(80.9%, 59.6%, 0%, 44.7%)
CIE-LAB	lab(26.97, 21.56, -49.71)
CIE-LCH	lch(26.97, 54.19, 293.45°)
OKLab	oklab(37.83% -0.0123 -0.1436)
OKLCH	oklch(37.83% 0.144 265.1)
XYZ	xyz(6.7211, 5.0816, 25.8207)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B398D #8D6F1B

analogous

#1B728D #1B398D #361B8D

triadic

#1B398D #8D1B39 #398D1B

tetradic

#1B398D #8D1B72 #8D6F1B #1B8D36

square

#1B398D #8D1B72 #8D6F1B #1B8D36

split-complementary

#1B398D #8D361B #728D1B

monochromatic

#070F26 #11245A #1B398D #254EC0 #476EDC

Accessibility & contrast

On white

10.41

#1B398D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B398D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B398D

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B398D	#FFFFFF	#000000	##FFFFFF
##1B398D	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004590

Deuteranopia (green-blind)

#003B8B

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b398d;
/* rgb */ color: rgb(27, 57, 141);
/* oklch */ color: oklch(37.8% 0.144 265.1);

Tailwind

colors: {
  custom: {
    50: '#6b6eaf',
    500: '#1b398d',
    950: '#000000',
  },
}

SCSS

$custom: #1b398d;
$custom-light: #6b6eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b398d",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 141
  },
  "hsl": {
    "h": 224.211,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.37834,
    "c": 0.14415,
    "h": 265.1
  },
  "luminance": 0.05082
}

Semantic roles & 50–950 ramp

primary

#1B398D

secondary

#BD9E46

accent

#BD3DEB

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1B398D

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

Preview Lab → · Contrast checker → · Palette generator →