#1B3C8E#1B3C8E

#1B3C8E is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.142 H 264.2°. Best body text is #FFFFFF at 10.08:1 contrast (WCAG AA passes).

Color values

HEX	#1B3C8E
RGB	rgb(27, 60, 142)
HSL	hsl(223, 68%, 33%)
HSV	hsv(223, 81%, 56%)
CMYK	cmyk(81%, 57.7%, 0%, 44.3%)
CIE-LAB	lab(27.89, 19.88, -48.83)
CIE-LCH	lch(27.89, 52.72, 292.16°)
OKLab	oklab(38.56% -0.0144 -0.141)
OKLCH	oklch(38.56% 0.142 264.2)
XYZ	xyz(6.9486, 5.4169, 26.2653)
Luminance	0.0542 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3C8E #8E6D1B

analogous

#1B758E #1B3C8E #341B8E

triadic

#1B3C8E #8E1B3C #3C8E1B

tetradic

#1B3C8E #8E1B75 #8E6D1B #1B8E34

square

#1B3C8E #8E1B75 #8E6D1B #1B8E34

split-complementary

#1B3C8E #8E341B #758E1B

monochromatic

#071127 #11265B #1B3C8E #2552C1 #4772DC

Accessibility & contrast

On white

10.08

#1B3C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B3C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3C8E

10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3C8E	#FFFFFF	#000000	##FFFFFF
##1B3C8E	1.00	10.08	2.08	10.08
#FFFFFF	10.08	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003D8C

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3c8e;
/* rgb */ color: rgb(27, 60, 142);
/* oklch */ color: oklch(38.6% 0.142 264.2);

Tailwind

colors: {
  custom: {
    50: '#6b71b0',
    500: '#1b3c8e',
    950: '#000000',
  },
}

SCSS

$custom: #1b3c8e;
$custom-light: #6b71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3c8e",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 142
  },
  "hsl": {
    "h": 222.783,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38555,
    "c": 0.14169,
    "h": 264.2
  },
  "luminance": 0.05418
}

Semantic roles & 50–950 ramp

primary

#1B3C8E

secondary

#BE9C47

accent

#B93DEB

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1B3C8E

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

Preview Lab → · Contrast checker → · Palette generator →