#1B3D7E#1B3D7E

#1B3D7E is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.117 H 261.8°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D7E
RGB	rgb(27, 61, 126)
HSL	hsl(219, 65%, 30%)
HSV	hsv(219, 79%, 49%)
CMYK	cmyk(78.6%, 51.6%, 0%, 50.6%)
CIE-LAB	lab(26.95, 12.68, -40.40)
CIE-LCH	lch(26.95, 42.34, 287.42°)
OKLab	oklab(37.45% -0.0168 -0.1161)
OKLCH	oklch(37.45% 0.117 261.8)
XYZ	xyz(5.8853, 5.0762, 20.4042)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D7E #7E5C1B

analogous

#1B6E7E #1B3D7E #2B1B7E

triadic

#1B3D7E #7E1B3D #3D7E1B

tetradic

#1B3D7E #7E1B6E #7E5C1B #1B7E2B

square

#1B3D7E #7E1B6E #7E5C1B #1B7E2B

split-complementary

#1B3D7E #7E2B1B #6E7E1B

monochromatic

#050C19 #10254C #1B3D7E #2655B0 #3E72D6

Accessibility & contrast

On white

10.42

#1B3D7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B3D7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D7E

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D7E	#FFFFFF	#000000	##FFFFFF
##1B3D7E	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164480

Deuteranopia (green-blind)

#003B7D

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3d7e;
/* rgb */ color: rgb(27, 61, 126);
/* oklch */ color: oklch(37.5% 0.117 261.8);

Tailwind

colors: {
  custom: {
    50: '#6771a4',
    500: '#1b3d7e',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d7e;
$custom-light: #6771a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d7e",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 126
  },
  "hsl": {
    "h": 219.394,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.37452,
    "c": 0.11736,
    "h": 261.8
  },
  "luminance": 0.05077
}

Semantic roles & 50–950 ramp

primary

#1B3D7E

secondary

#B28C43

accent

#AE40E8

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D7E

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

Preview Lab → · Contrast checker → · Palette generator →