#1B439A#1B439A

#1B439A is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.1% C 0.149 H 262.9°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B439A
RGB	rgb(27, 67, 154)
HSL	hsl(221, 70%, 35%)
HSV	hsv(221, 82%, 60%)
CMYK	cmyk(82.5%, 56.5%, 0%, 39.6%)
CIE-LAB	lab(30.83, 19.89, -51.39)
CIE-LCH	lch(30.83, 55.11, 291.15°)
OKLab	oklab(41.07% -0.0184 -0.1484)
OKLCH	oklch(41.07% 0.15 262.9)
XYZ	xyz(8.2898, 6.5794, 31.3986)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B439A #9A721B

analogous

#1B839A #1B439A #321B9A

triadic

#1B439A #9A1B43 #439A1B

tetradic

#1B439A #9A1B83 #9A721B #1B9A32

square

#1B439A #9A1B83 #9A721B #1B9A32

split-complementary

#1B439A #9A321B #839A1B

monochromatic

#091632 #122C66 #1B439A #245ACE #4F7DE0

Accessibility & contrast

On white

9.07

#1B439A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1B439A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B439A

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B439A	#FFFFFF	#000000	##FFFFFF
##1B439A	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9D

Deuteranopia (green-blind)

#004398

Tritanopia (blue-blind)

#005968

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b439a;
/* rgb */ color: rgb(27, 67, 154);
/* oklch */ color: oklch(41.1% 0.149 262.9);

Tailwind

colors: {
  custom: {
    50: '#6e76b8',
    500: '#1b439a',
    950: '#000000',
  },
}

SCSS

$custom: #1b439a;
$custom-light: #6e76b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b439a",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 154
  },
  "hsl": {
    "h": 221.102,
    "s": 70.166,
    "l": 35.49
  },
  "oklch": {
    "l": 0.41074,
    "c": 0.1495,
    "h": 262.9
  },
  "luminance": 0.0658
}

Semantic roles & 50–950 ramp

primary

#1B439A

secondary

#C39E4E

accent

#B53BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B439A

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

Preview Lab → · Contrast checker → · Palette generator →