#1B3D7B#1B3D7B

#1B3D7B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.2% C 0.113 H 261.2°. Best body text is #FFFFFF at 10.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D7B
RGB	rgb(27, 61, 123)
HSL	hsl(219, 64%, 29%)
HSV	hsv(219, 78%, 48%)
CMYK	cmyk(78%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(26.73, 11.45, -38.86)
CIE-LCH	lch(26.73, 40.51, 286.42°)
OKLab	oklab(37.22% -0.0173 -0.1116)
OKLCH	oklch(37.22% 0.113 261.2)
XYZ	xyz(5.6946, 4.9999, 19.4000)
Luminance	0.0500 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D7B #7B591B

analogous

#1B6D7B #1B3D7B #291B7B

triadic

#1B3D7B #7B1B3D #3D7B1B

tetradic

#1B3D7B #7B1B6D #7B591B #1B7B29

square

#1B3D7B #7B1B6D #7B591B #1B7B29

split-complementary

#1B3D7B #7B291B #6D7B1B

monochromatic

#060C19 #102449 #1B3D7B #2656AD #3C72D4

Accessibility & contrast

On white

10.50

#1B3D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1B3D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D7B

10.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D7B	#FFFFFF	#000000	##FFFFFF
##1B3D7B	1.00	10.50	2.00	10.50
#FFFFFF	10.50	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A447D

Deuteranopia (green-blind)

#003B7A

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b3d7b;
/* rgb */ color: rgb(27, 61, 123);
/* oklch */ color: oklch(37.2% 0.113 261.2);

Tailwind

colors: {
  custom: {
    50: '#6672a2',
    500: '#1b3d7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d7b;
$custom-light: #6672a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d7b",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 218.75,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.37217,
    "c": 0.11295,
    "h": 261.2
  },
  "luminance": 0.05001
}

Semantic roles & 50–950 ramp

primary

#1B3D7B

secondary

#AF8943

accent

#AC41E7

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3D7B

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

Preview Lab → · Contrast checker → · Palette generator →