#1B3D8D#1B3D8D

#1B3D8D is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.139 H 263.7°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D8D
RGB	rgb(27, 61, 141)
HSL	hsl(222, 68%, 33%)
HSV	hsv(222, 81%, 55%)
CMYK	cmyk(80.9%, 56.7%, 0%, 44.7%)
CIE-LAB	lab(28.09, 18.78, -47.88)
CIE-LCH	lch(28.09, 51.43, 291.42°)
OKLab	oklab(38.68% -0.0152 -0.1381)
OKLCH	oklch(38.68% 0.139 263.7)
XYZ	xyz(6.9267, 5.4928, 25.8893)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D8D #8D6B1B

analogous

#1B768D #1B3D8D #321B8D

triadic

#1B3D8D #8D1B3D #3D8D1B

tetradic

#1B3D8D #8D1B76 #8D6B1B #1B8D32

square

#1B3D8D #8D1B76 #8D6B1B #1B8D32

split-complementary

#1B3D8D #8D321B #768D1B

monochromatic

#071126 #11275A #1B3D8D #2553C0 #4773DC

Accessibility & contrast

On white

10.01

#1B3D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1B3D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D8D

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D8D	#FFFFFF	#000000	##FFFFFF
##1B3D8D	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004890

Deuteranopia (green-blind)

#003D8B

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3d8d;
/* rgb */ color: rgb(27, 61, 141);
/* oklch */ color: oklch(38.7% 0.139 263.7);

Tailwind

colors: {
  custom: {
    50: '#6b71af',
    500: '#1b3d8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d8d;
$custom-light: #6b71af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d8d",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 141
  },
  "hsl": {
    "h": 222.105,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38684,
    "c": 0.13898,
    "h": 263.7
  },
  "luminance": 0.05494
}

Semantic roles & 50–950 ramp

primary

#1B3D8D

secondary

#BD9A46

accent

#B73DEB

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B3D8D

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

Preview Lab → · Contrast checker → · Palette generator →