#1B3C8D#1B3C8D

#1B3C8D is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.140 H 264.1°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B3C8D
RGB	rgb(27, 60, 141)
HSL	hsl(223, 68%, 33%)
HSV	hsv(223, 81%, 55%)
CMYK	cmyk(80.9%, 57.4%, 0%, 44.7%)
CIE-LAB	lab(27.81, 19.48, -48.34)
CIE-LCH	lch(27.81, 52.12, 291.95°)
OKLab	oklab(38.47% -0.0144 -0.1395)
OKLCH	oklch(38.47% 0.14 264.1)
XYZ	xyz(6.8739, 5.3870, 25.8717)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3C8D #8D6C1B

analogous

#1B758D #1B3C8D #331B8D

triadic

#1B3C8D #8D1B3C #3C8D1B

tetradic

#1B3C8D #8D1B75 #8D6C1B #1B8D33

square

#1B3C8D #8D1B75 #8D6C1B #1B8D33

split-complementary

#1B3C8D #8D331B #758D1B

monochromatic

#071026 #11265A #1B3C8D #2552C0 #4772DC

Accessibility & contrast

On white

10.11

#1B3C8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B3C8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3C8D

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3C8D	#FFFFFF	#000000	##FFFFFF
##1B3C8D	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004790

Deuteranopia (green-blind)

#003D8B

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3c8d;
/* rgb */ color: rgb(27, 60, 141);
/* oklch */ color: oklch(38.5% 0.140 264.1);

Tailwind

colors: {
  custom: {
    50: '#6b71af',
    500: '#1b3c8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3c8d;
$custom-light: #6b71af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3c8d",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 141
  },
  "hsl": {
    "h": 222.632,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38469,
    "c": 0.14027,
    "h": 264.1
  },
  "luminance": 0.05388
}

Semantic roles & 50–950 ramp

primary

#1B3C8D

secondary

#BD9B46

accent

#B83DEB

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B3C8D

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

Preview Lab → · Contrast checker → · Palette generator →