#1B3F82#1B3F82

#1B3F82 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.2% C 0.121 H 261.4°. Best body text is #FFFFFF at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F82
RGB	rgb(27, 63, 130)
HSL	hsl(219, 66%, 31%)
HSV	hsv(219, 79%, 51%)
CMYK	cmyk(79.2%, 51.5%, 0%, 49%)
CIE-LAB	lab(27.84, 12.92, -41.46)
CIE-LCH	lch(27.84, 43.43, 287.30°)
OKLab	oklab(38.23% -0.0179 -0.1192)
OKLCH	oklch(38.23% 0.121 261.4)
XYZ	xyz(6.2573, 5.3990, 21.8271)
Luminance	0.0540 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F82 #825E1B

analogous

#1B7282 #1B3F82 #2A1B82

triadic

#1B3F82 #821B3F #3F821B

tetradic

#1B3F82 #821B72 #825E1B #1B822A

square

#1B3F82 #821B72 #825E1B #1B822A

split-complementary

#1B3F82 #822A1B #72821B

monochromatic

#060E1D #10264F #1B3F82 #2658B5 #4075D7

Accessibility & contrast

On white

10.10

#1B3F82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B3F82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F82

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F82	#FFFFFF	#000000	##FFFFFF
##1B3F82	1.00	10.10	2.08	10.10
#FFFFFF	10.10	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164784

Deuteranopia (green-blind)

#003D81

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3f82;
/* rgb */ color: rgb(27, 63, 130);
/* oklch */ color: oklch(38.2% 0.121 261.4);

Tailwind

colors: {
  custom: {
    50: '#6873a7',
    500: '#1b3f82',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f82;
$custom-light: #6873a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f82",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 130
  },
  "hsl": {
    "h": 219.029,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.38226,
    "c": 0.12057,
    "h": 261.4
  },
  "luminance": 0.054
}

Semantic roles & 50–950 ramp

primary

#1B3F82

secondary

#B68E43

accent

#AD3FE9

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B3F82

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

Preview Lab → · Contrast checker → · Palette generator →