#1B3D7C#1B3D7C

#1B3D7C is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.114 H 261.4°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D7C
RGB	rgb(27, 61, 124)
HSL	hsl(219, 64%, 30%)
HSV	hsv(219, 78%, 49%)
CMYK	cmyk(78.2%, 50.8%, 0%, 51.4%)
CIE-LAB	lab(26.81, 11.86, -39.37)
CIE-LCH	lch(26.81, 41.12, 286.76°)
OKLab	oklab(37.3% -0.0171 -0.1131)
OKLCH	oklch(37.3% 0.114 261.4)
XYZ	xyz(5.7575, 5.0251, 19.7314)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D7C #7C5A1B

analogous

#1B6E7C #1B3D7C #2A1B7C

triadic

#1B3D7C #7C1B3D #3D7C1B

tetradic

#1B3D7C #7C1B6E #7C5A1B #1B7C2A

square

#1B3D7C #7C1B6E #7C5A1B #1B7C2A

split-complementary

#1B3D7C #7C2A1B #6E7C1B

monochromatic

#050C19 #10244A #1B3D7C #2656AE #3D72D5

Accessibility & contrast

On white

10.47

#1B3D7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B3D7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D7C

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D7C	#FFFFFF	#000000	##FFFFFF
##1B3D7C	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19447E

Deuteranopia (green-blind)

#003B7B

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b3d7c;
/* rgb */ color: rgb(27, 61, 124);
/* oklch */ color: oklch(37.3% 0.114 261.4);

Tailwind

colors: {
  custom: {
    50: '#6771a2',
    500: '#1b3d7c',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d7c;
$custom-light: #6771a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d7c",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 124
  },
  "hsl": {
    "h": 218.969,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37295,
    "c": 0.11443,
    "h": 261.4
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#1B3D7C

secondary

#B08A43

accent

#AD41E7

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D7C

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

Preview Lab → · Contrast checker → · Palette generator →