#1B3D90#1B3D90

#1B3D90 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.143 H 264.0°. Best body text is #FFFFFF at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D90
RGB	rgb(27, 61, 144)
HSL	hsl(223, 68%, 34%)
HSV	hsv(223, 81%, 56%)
CMYK	cmyk(81.3%, 57.6%, 0%, 43.5%)
CIE-LAB	lab(28.34, 20.00, -49.33)
CIE-LCH	lch(28.34, 53.23, 292.06°)
OKLab	oklab(38.94% -0.0149 -0.1424)
OKLCH	oklch(38.94% 0.143 264)
XYZ	xyz(7.1530, 5.5833, 27.0808)
Luminance	0.0558 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D90 #906E1B

analogous

#1B7790 #1B3D90 #331B90

triadic

#1B3D90 #901B3D #3D901B

tetradic

#1B3D90 #901B77 #906E1B #1B9033

square

#1B3D90 #901B77 #906E1B #1B9033

split-complementary

#1B3D90 #90331B #77901B

monochromatic

#081129 #11275C #1B3D90 #2553C4 #4974DD

Accessibility & contrast

On white

9.92

#1B3D90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1B3D90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D90

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D90	#FFFFFF	#000000	##FFFFFF
##1B3D90	1.00	9.92	2.12	9.92
#FFFFFF	9.92	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004893

Deuteranopia (green-blind)

#003E8E

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b3d90;
/* rgb */ color: rgb(27, 61, 144);
/* oklch */ color: oklch(38.9% 0.143 264.0);

Tailwind

colors: {
  custom: {
    50: '#6c72b1',
    500: '#1b3d90',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d90;
$custom-light: #6c72b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d90",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 144
  },
  "hsl": {
    "h": 222.564,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.38941,
    "c": 0.14321,
    "h": 264
  },
  "luminance": 0.05584
}

Semantic roles & 50–950 ramp

primary

#1B3D90

secondary

#BF9C48

accent

#B83DEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B3D90

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

Preview Lab → · Contrast checker → · Palette generator →