#1B4182#1B4182

#1B4182 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.7% C 0.118 H 260.4°. Best body text is #FFFFFF at 9.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B4182
RGB	rgb(27, 65, 130)
HSL	hsl(218, 66%, 31%)
HSV	hsv(218, 79%, 51%)
CMYK	cmyk(79.2%, 50%, 0%, 49%)
CIE-LAB	lab(28.44, 11.53, -40.49)
CIE-LCH	lch(28.44, 42.10, 285.89°)
OKLab	oklab(38.69% -0.0197 -0.1163)
OKLCH	oklch(38.69% 0.118 260.4)
XYZ	xyz(6.3701, 5.6246, 21.8647)
Luminance	0.0563 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4182 #825C1B

analogous

#1B7482 #1B4182 #281B82

triadic

#1B4182 #821B41 #41821B

tetradic

#1B4182 #821B74 #825C1B #1B8228

square

#1B4182 #821B74 #825C1B #1B8228

split-complementary

#1B4182 #82281B #74821B

monochromatic

#060E1D #10284F #1B4182 #265AB5 #4078D7

Accessibility & contrast

On white

9.88

#1B4182 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1B4182 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4182

9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4182	#FFFFFF	#000000	##FFFFFF
##1B4182	1.00	9.88	2.13	9.88
#FFFFFF	9.88	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4884

Deuteranopia (green-blind)

#003F81

Tritanopia (blue-blind)

#00515B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b4182;
/* rgb */ color: rgb(27, 65, 130);
/* oklch */ color: oklch(38.7% 0.118 260.4);

Tailwind

colors: {
  custom: {
    50: '#6875a7',
    500: '#1b4182',
    950: '#000000',
  },
}

SCSS

$custom: #1b4182;
$custom-light: #6875a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4182",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 130
  },
  "hsl": {
    "h": 217.864,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.38688,
    "c": 0.11799,
    "h": 260.4
  },
  "luminance": 0.05625
}

Semantic roles & 50–950 ramp

primary

#1B4182

secondary

#B68B43

accent

#AA3FE9

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B4182

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

Preview Lab → · Contrast checker → · Palette generator →