#1B3D7F#1B3D7F

#1B3D7F is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.119 H 261.9°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D7F
RGB	rgb(27, 61, 127)
HSL	hsl(220, 65%, 30%)
HSV	hsv(220, 79%, 50%)
CMYK	cmyk(78.7%, 52%, 0%, 50.2%)
CIE-LAB	lab(27.02, 13.09, -40.91)
CIE-LCH	lch(27.02, 42.95, 287.74°)
OKLab	oklab(37.53% -0.0167 -0.1176)
OKLCH	oklch(37.53% 0.119 261.9)
XYZ	xyz(5.9501, 5.1021, 20.7458)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D7F #7F5D1B

analogous

#1B6F7F #1B3D7F #2B1B7F

triadic

#1B3D7F #7F1B3D #3D7F1B

tetradic

#1B3D7F #7F1B6F #7F5D1B #1B7F2B

square

#1B3D7F #7F1B6F #7F5D1B #1B7F2B

split-complementary

#1B3D7F #7F2B1B #6F7F1B

monochromatic

#060D1A #10254D #1B3D7F #2655B1 #3E72D6

Accessibility & contrast

On white

10.39

#1B3D7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B3D7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D7F

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D7F	#FFFFFF	#000000	##FFFFFF
##1B3D7F	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154581

Deuteranopia (green-blind)

#003C7E

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3d7f;
/* rgb */ color: rgb(27, 61, 127);
/* oklch */ color: oklch(37.5% 0.119 261.9);

Tailwind

colors: {
  custom: {
    50: '#6771a5',
    500: '#1b3d7f',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d7f;
$custom-light: #6771a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d7f",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 127
  },
  "hsl": {
    "h": 219.6,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37531,
    "c": 0.11882,
    "h": 261.9
  },
  "luminance": 0.05103
}

Semantic roles & 50–950 ramp

primary

#1B3D7F

secondary

#B38D43

accent

#AF40E8

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D7F

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

Preview Lab → · Contrast checker → · Palette generator →