#1B3D8E#1B3D8E

#1B3D8E is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.140 H 263.8°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D8E
RGB	rgb(27, 61, 142)
HSL	hsl(222, 68%, 33%)
HSV	hsv(222, 81%, 56%)
CMYK	cmyk(81%, 57%, 0%, 44.3%)
CIE-LAB	lab(28.17, 19.19, -48.36)
CIE-LCH	lch(28.17, 52.03, 291.64°)
OKLab	oklab(38.77% -0.0151 -0.1396)
OKLCH	oklch(38.77% 0.14 263.8)
XYZ	xyz(7.0015, 5.5227, 26.2829)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D8E #8E6C1B

analogous

#1B768E #1B3D8E #331B8E

triadic

#1B3D8E #8E1B3D #3D8E1B

tetradic

#1B3D8E #8E1B76 #8E6C1B #1B8E33

square

#1B3D8E #8E1B76 #8E6C1B #1B8E33

split-complementary

#1B3D8E #8E331B #768E1B

monochromatic

#071127 #11275B #1B3D8E #2553C1 #4773DC

Accessibility & contrast

On white

9.98

#1B3D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1B3D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D8E

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D8E	#FFFFFF	#000000	##FFFFFF
##1B3D8E	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004891

Deuteranopia (green-blind)

#003D8C

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3d8e;
/* rgb */ color: rgb(27, 61, 142);
/* oklch */ color: oklch(38.8% 0.140 263.8);

Tailwind

colors: {
  custom: {
    50: '#6b71b0',
    500: '#1b3d8e',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d8e;
$custom-light: #6b71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d8e",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 142
  },
  "hsl": {
    "h": 222.261,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38769,
    "c": 0.14039,
    "h": 263.8
  },
  "luminance": 0.05523
}

Semantic roles & 50–950 ramp

primary

#1B3D8E

secondary

#BE9B47

accent

#B73DEB

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1B3D8E

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

Preview Lab → · Contrast checker → · Palette generator →