#1B3D80#1B3D80

#1B3D80 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.6% C 0.120 H 262.1°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D80
RGB	rgb(27, 61, 128)
HSL	hsl(220, 65%, 30%)
HSV	hsv(220, 79%, 50%)
CMYK	cmyk(78.9%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(27.10, 13.49, -41.41)
CIE-LCH	lch(27.10, 43.56, 288.05°)
OKLab	oklab(37.61% -0.0165 -0.1191)
OKLCH	oklch(37.61% 0.12 262.1)
XYZ	xyz(6.0156, 5.1283, 21.0907)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D80 #805E1B

analogous

#1B6F80 #1B3D80 #2B1B80

triadic

#1B3D80 #801B3D #3D801B

tetradic

#1B3D80 #801B6F #805E1B #1B802B

square

#1B3D80 #801B6F #805E1B #1B802B

split-complementary

#1B3D80 #802B1B #6F801B

monochromatic

#060D1B #10254D #1B3D80 #2655B3 #3F72D6

Accessibility & contrast

On white

10.37

#1B3D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1B3D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D80

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D80	#FFFFFF	#000000	##FFFFFF
##1B3D80	1.00	10.37	2.03	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134582

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3d80;
/* rgb */ color: rgb(27, 61, 128);
/* oklch */ color: oklch(37.6% 0.120 262.1);

Tailwind

colors: {
  custom: {
    50: '#6871a5',
    500: '#1b3d80',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d80;
$custom-light: #6871a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d80",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 219.802,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.3761,
    "c": 0.12028,
    "h": 262.1
  },
  "luminance": 0.05129
}

Semantic roles & 50–950 ramp

primary

#1B3D80

secondary

#B48E43

accent

#AF40E8

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D80

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

Preview Lab → · Contrast checker → · Palette generator →