#1B3E8F#1B3E8F

#1B3E8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.1% C 0.141 H 263.6°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E8F
RGB	rgb(27, 62, 143)
HSL	hsl(222, 68%, 33%)
HSV	hsv(222, 81%, 56%)
CMYK	cmyk(81.1%, 56.6%, 0%, 43.9%)
CIE-LAB	lab(28.54, 18.90, -48.39)
CIE-LCH	lch(28.54, 51.95, 291.33°)
OKLab	oklab(39.07% -0.0157 -0.1396)
OKLCH	oklch(39.07% 0.141 263.6)
XYZ	xyz(7.1308, 5.6606, 26.6981)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E8F #8F6C1B

analogous

#1B788F #1B3E8F #321B8F

triadic

#1B3E8F #8F1B3E #3E8F1B

tetradic

#1B3E8F #8F1B78 #8F6C1B #1B8F32

square

#1B3E8F #8F1B78 #8F6C1B #1B8F32

split-complementary

#1B3E8F #8F321B #788F1B

monochromatic

#081128 #11285C #1B3E8F #2554C2 #4875DC

Accessibility & contrast

On white

9.85

#1B3E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1B3E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E8F

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E8F	#FFFFFF	#000000	##FFFFFF
##1B3E8F	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b3e8f;
/* rgb */ color: rgb(27, 62, 143);
/* oklch */ color: oklch(39.1% 0.141 263.6);

Tailwind

colors: {
  custom: {
    50: '#6b72b0',
    500: '#1b3e8f',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e8f;
$custom-light: #6b72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e8f",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 143
  },
  "hsl": {
    "h": 221.897,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.3907,
    "c": 0.14051,
    "h": 263.6
  },
  "luminance": 0.05661
}

Semantic roles & 50–950 ramp

primary

#1B3E8F

secondary

#BE9A48

accent

#B63DEB

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B3E8F

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

Preview Lab → · Contrast checker → · Palette generator →