#1B3A90#1B3A90

#1B3A90 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.3% C 0.147 H 265.0°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B3A90
RGB	rgb(27, 58, 144)
HSL	hsl(224, 68%, 34%)
HSV	hsv(224, 81%, 56%)
CMYK	cmyk(81.3%, 59.7%, 0%, 43.5%)
CIE-LAB	lab(27.50, 22.07, -50.70)
CIE-LCH	lch(27.50, 55.30, 293.53°)
OKLab	oklab(38.31% -0.0129 -0.1465)
OKLCH	oklch(38.31% 0.147 265)
XYZ	xyz(6.9973, 5.2719, 27.0289)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3A90 #90711B

analogous

#1B7490 #1B3A90 #371B90

triadic

#1B3A90 #901B3A #3A901B

tetradic

#1B3A90 #901B74 #90711B #1B9037

square

#1B3A90 #901B74 #90711B #1B9037

split-complementary

#1B3A90 #90371B #74901B

monochromatic

#081029 #11255C #1B3A90 #254FC4 #4970DD

Accessibility & contrast

On white

10.22

#1B3A90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1B3A90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3A90

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3A90	#FFFFFF	#000000	##FFFFFF
##1B3A90	1.00	10.22	2.05	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004793

Deuteranopia (green-blind)

#003C8E

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3a90;
/* rgb */ color: rgb(27, 58, 144);
/* oklch */ color: oklch(38.3% 0.147 265.0);

Tailwind

colors: {
  custom: {
    50: '#6c6fb1',
    500: '#1b3a90',
    950: '#000000',
  },
}

SCSS

$custom: #1b3a90;
$custom-light: #6c6fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3a90",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 144
  },
  "hsl": {
    "h": 224.103,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.3831,
    "c": 0.14706,
    "h": 265
  },
  "luminance": 0.05273
}

Semantic roles & 50–950 ramp

primary

#1B3A90

secondary

#BF9F48

accent

#BD3DEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B3A90

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

Preview Lab → · Contrast checker → · Palette generator →