#1B3E99#1B3E99

#1B3E99 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.9% C 0.154 H 264.4°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E99
RGB	rgb(27, 62, 153)
HSL	hsl(223, 70%, 35%)
HSV	hsv(223, 82%, 60%)
CMYK	cmyk(82.4%, 59.5%, 0%, 40%)
CIE-LAB	lab(29.35, 22.92, -53.19)
CIE-LCH	lch(29.35, 57.91, 293.31°)
OKLab	oklab(39.94% -0.0151 -0.1537)
OKLCH	oklch(39.94% 0.154 264.4)
XYZ	xyz(7.9223, 5.9772, 30.8670)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E99 #99761B

analogous

#1B7D99 #1B3E99 #371B99

triadic

#1B3E99 #991B3E #3E991B

tetradic

#1B3E99 #991B7D #99761B #1B9937

square

#1B3E99 #991B7D #99761B #1B9937

split-complementary

#1B3E99 #99371B #7D991B

monochromatic

#091431 #122965 #1B3E99 #2453CD #4F77E0

Accessibility & contrast

On white

9.56

#1B3E99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1B3E99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E99

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E99	#FFFFFF	#000000	##FFFFFF
##1B3E99	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#004097

Tritanopia (blue-blind)

#005565

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3e99;
/* rgb */ color: rgb(27, 62, 153);
/* oklch */ color: oklch(39.9% 0.154 264.4);

Tailwind

colors: {
  custom: {
    50: '#6e72b8',
    500: '#1b3e99',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e99;
$custom-light: #6e72b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e99",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 153
  },
  "hsl": {
    "h": 223.333,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.39939,
    "c": 0.15447,
    "h": 264.4
  },
  "luminance": 0.05978
}

Semantic roles & 50–950 ramp

primary

#1B3E99

secondary

#C2A24E

accent

#BB3BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B3E99

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

Preview Lab → · Contrast checker → · Palette generator →