#1B3D7D#1B3D7D

#1B3D7D is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.116 H 261.6°. Best body text is #FFFFFF at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D7D
RGB	rgb(27, 61, 125)
HSL	hsl(219, 64%, 30%)
HSV	hsv(219, 78%, 49%)
CMYK	cmyk(78.4%, 51.2%, 0%, 51%)
CIE-LAB	lab(26.88, 12.27, -39.89)
CIE-LCH	lch(26.88, 41.73, 287.10°)
OKLab	oklab(37.37% -0.017 -0.1146)
OKLCH	oklch(37.37% 0.116 261.6)
XYZ	xyz(5.8211, 5.0505, 20.0661)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D7D #7D5B1B

analogous

#1B6E7D #1B3D7D #2A1B7D

triadic

#1B3D7D #7D1B3D #3D7D1B

tetradic

#1B3D7D #7D1B6E #7D5B1B #1B7D2A

square

#1B3D7D #7D1B6E #7D5B1B #1B7D2A

split-complementary

#1B3D7D #7D2A1B #6E7D1B

monochromatic

#050C19 #10244B #1B3D7D #2656AF #3D72D5

Accessibility & contrast

On white

10.45

#1B3D7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B3D7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D7D

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D7D	#FFFFFF	#000000	##FFFFFF
##1B3D7D	1.00	10.45	2.01	10.45
#FFFFFF	10.45	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17447F

Deuteranopia (green-blind)

#003B7C

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3d7d;
/* rgb */ color: rgb(27, 61, 125);
/* oklch */ color: oklch(37.4% 0.116 261.6);

Tailwind

colors: {
  custom: {
    50: '#6771a3',
    500: '#1b3d7d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d7d;
$custom-light: #6771a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d7d",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 125
  },
  "hsl": {
    "h": 219.184,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37373,
    "c": 0.11589,
    "h": 261.6
  },
  "luminance": 0.05051
}

Semantic roles & 50–950 ramp

primary

#1B3D7D

secondary

#B18B43

accent

#AD40E7

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D7D

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

Preview Lab → · Contrast checker → · Palette generator →