#1B4282#1B4282

#1B4282 is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.9% C 0.117 H 259.9°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B4282
RGB	rgb(27, 66, 130)
HSL	hsl(217, 66%, 31%)
HSV	hsv(217, 79%, 51%)
CMYK	cmyk(79.2%, 49.2%, 0%, 49%)
CIE-LAB	lab(28.75, 10.83, -40.00)
CIE-LCH	lch(28.75, 41.44, 285.15°)
OKLab	oklab(38.92% -0.0205 -0.1149)
OKLCH	oklch(38.92% 0.117 259.9)
XYZ	xyz(6.4280, 5.7404, 21.8840)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4282 #825B1B

analogous

#1B7582 #1B4282 #281B82

triadic

#1B4282 #821B42 #42821B

tetradic

#1B4282 #821B75 #825B1B #1B8228

square

#1B4282 #821B75 #825B1B #1B8228

split-complementary

#1B4282 #82281B #75821B

monochromatic

#060F1D #10284F #1B4282 #265CB5 #4079D7

Accessibility & contrast

On white

9.78

#1B4282 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1B4282 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4282

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4282	#FFFFFF	#000000	##FFFFFF
##1B4282	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4984

Deuteranopia (green-blind)

#003F81

Tritanopia (blue-blind)

#00515B

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b4282;
/* rgb */ color: rgb(27, 66, 130);
/* oklch */ color: oklch(38.9% 0.117 259.9);

Tailwind

colors: {
  custom: {
    50: '#6875a7',
    500: '#1b4282',
    950: '#000000',
  },
}

SCSS

$custom: #1b4282;
$custom-light: #6875a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4282",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 130
  },
  "hsl": {
    "h": 217.282,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.3892,
    "c": 0.1167,
    "h": 259.9
  },
  "luminance": 0.05741
}

Semantic roles & 50–950 ramp

primary

#1B4282

secondary

#B68A43

accent

#A83FE9

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B4282

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

Preview Lab → · Contrast checker → · Palette generator →