#1B3C86#1B3C86

#1B3C86 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.9% C 0.130 H 263.4°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B3C86
RGB	rgb(27, 60, 134)
HSL	hsl(221, 66%, 32%)
HSV	hsv(221, 80%, 53%)
CMYK	cmyk(79.9%, 55.2%, 0%, 47.5%)
CIE-LAB	lab(27.26, 16.64, -44.90)
CIE-LCH	lch(27.26, 47.89, 290.34°)
OKLab	oklab(37.88% -0.015 -0.1294)
OKLCH	oklch(37.88% 0.13 263.4)
XYZ	xyz(6.3694, 5.1852, 23.2148)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3C86 #86651B

analogous

#1B7286 #1B3C86 #2F1B86

triadic

#1B3C86 #861B3C #3C861B

tetradic

#1B3C86 #861B72 #86651B #1B862F

square

#1B3C86 #861B72 #86651B #1B862F

split-complementary

#1B3C86 #862F1B #72861B

monochromatic

#060E20 #112553 #1B3C86 #2553B9 #4271D9

Accessibility & contrast

On white

10.31

#1B3C86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1B3C86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3C86

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3C86	#FFFFFF	#000000	##FFFFFF
##1B3C86	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014689

Deuteranopia (green-blind)

#003C85

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3c86;
/* rgb */ color: rgb(27, 60, 134);
/* oklch */ color: oklch(37.9% 0.130 263.4);

Tailwind

colors: {
  custom: {
    50: '#6971aa',
    500: '#1b3c86',
    950: '#000000',
  },
}

SCSS

$custom: #1b3c86;
$custom-light: #6971aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3c86",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 134
  },
  "hsl": {
    "h": 221.495,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37875,
    "c": 0.13029,
    "h": 263.4
  },
  "luminance": 0.05186
}

Semantic roles & 50–950 ramp

primary

#1B3C86

secondary

#B99544

accent

#B53EE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3C86

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

Preview Lab → · Contrast checker → · Palette generator →