#1B3F87#1B3F87

#1B3F87 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.128 H 262.2°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F87
RGB	rgb(27, 63, 135)
HSL	hsl(220, 67%, 32%)
HSV	hsv(220, 80%, 53%)
CMYK	cmyk(80%, 53.3%, 0%, 47.1%)
CIE-LAB	lab(28.21, 14.96, -43.98)
CIE-LCH	lch(28.21, 46.45, 288.78°)
OKLab	oklab(38.63% -0.0173 -0.1266)
OKLCH	oklch(38.63% 0.128 262.2)
XYZ	xyz(6.6011, 5.5365, 23.6377)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F87 #87631B

analogous

#1B7587 #1B3F87 #2D1B87

triadic

#1B3F87 #871B3F #3F871B

tetradic

#1B3F87 #871B75 #87631B #1B872D

square

#1B3F87 #871B75 #87631B #1B872D

split-complementary

#1B3F87 #872D1B #75871B

monochromatic

#070F21 #112754 #1B3F87 #2557BA #4375D9

Accessibility & contrast

On white

9.96

#1B3F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1B3F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F87

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F87	#FFFFFF	#000000	##FFFFFF
##1B3F87	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E488A

Deuteranopia (green-blind)

#003E86

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b3f87;
/* rgb */ color: rgb(27, 63, 135);
/* oklch */ color: oklch(38.6% 0.128 262.2);

Tailwind

colors: {
  custom: {
    50: '#6973aa',
    500: '#1b3f87',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f87;
$custom-light: #6973aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f87",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 135
  },
  "hsl": {
    "h": 220,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38626,
    "c": 0.1278,
    "h": 262.2
  },
  "luminance": 0.05537
}

Semantic roles & 50–950 ramp

primary

#1B3F87

secondary

#BA9344

accent

#B03EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B3F87

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

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