#1B3FAA#1B3FAA

#1B3FAA is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.7% C 0.176 H 265.0°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B3FAA
RGB	rgb(27, 63, 170)
HSL	hsl(225, 73%, 39%)
HSV	hsv(225, 84%, 67%)
CMYK	cmyk(84.1%, 62.9%, 0%, 33.3%)
CIE-LAB	lab(31.09, 28.93, -60.62)
CIE-LCH	lch(31.09, 67.17, 295.51°)
OKLab	oklab(41.69% -0.0153 -0.1755)
OKLCH	oklch(41.69% 0.176 265)
XYZ	xyz(9.4826, 6.6891, 38.8138)
Luminance	0.0669 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3FAA #AA861B

analogous

#1B86AA #1B3FAA #3E1BAA

triadic

#1B3FAA #AA1B3F #3FAA1B

tetradic

#1B3FAA #AA1B86 #AA861B #1BAA3E

square

#1B3FAA #AA1B86 #AA861B #1BAA3E

split-complementary

#1B3FAA #AA3E1B #86AA1B

monochromatic

#0A1840 #132B75 #1B3FAA #2654DC #5B7DE5

Accessibility & contrast

On white

8.98

#1B3FAA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1B3FAA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3FAA

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3FAA	#FFFFFF	#000000	##FFFFFF
##1B3FAA	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AD

Deuteranopia (green-blind)

#0043A8

Tritanopia (blue-blind)

#005B6E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b3faa;
/* rgb */ color: rgb(27, 63, 170);
/* oklch */ color: oklch(41.7% 0.176 265.0);

Tailwind

colors: {
  custom: {
    50: '#7373c4',
    500: '#1b3faa',
    950: '#000000',
  },
}

SCSS

$custom: #1b3faa;
$custom-light: #7373c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3faa",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 170
  },
  "hsl": {
    "h": 224.895,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.41686,
    "c": 0.17618,
    "h": 265
  },
  "luminance": 0.0669
}

Semantic roles & 50–950 ramp

primary

#1B3FAA

secondary

#C9AC58

accent

#C139EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B3FAA

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

Preview Lab → · Contrast checker → · Palette generator →