#1B4081#1B4081

#1B4081 is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.4% C 0.118 H 260.7°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#1B4081
RGB	rgb(27, 64, 129)
HSL	hsl(218, 65%, 31%)
HSV	hsv(218, 79%, 51%)
CMYK	cmyk(79.1%, 50.4%, 0%, 49.4%)
CIE-LAB	lab(28.07, 11.81, -40.47)
CIE-LCH	lch(28.07, 42.16, 286.27°)
OKLab	oklab(38.38% -0.019 -0.1163)
OKLCH	oklch(38.38% 0.118 260.7)
XYZ	xyz(6.2464, 5.4841, 21.4939)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4081 #815C1B

analogous

#1B7381 #1B4081 #291B81

triadic

#1B4081 #811B40 #40811B

tetradic

#1B4081 #811B73 #815C1B #1B8129

square

#1B4081 #811B73 #815C1B #1B8129

split-complementary

#1B4081 #81291B #73811B

monochromatic

#060E1C #10274E #1B4081 #2659B4 #3F76D7

Accessibility & contrast

On white

10.01

#1B4081 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1B4081 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4081

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4081	#FFFFFF	#000000	##FFFFFF
##1B4081	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4783

Deuteranopia (green-blind)

#003E80

Tritanopia (blue-blind)

#00505A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b4081;
/* rgb */ color: rgb(27, 64, 129);
/* oklch */ color: oklch(38.4% 0.118 260.7);

Tailwind

colors: {
  custom: {
    50: '#6874a6',
    500: '#1b4081',
    950: '#000000',
  },
}

SCSS

$custom: #1b4081;
$custom-light: #6874a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4081",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 129
  },
  "hsl": {
    "h": 218.235,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.38379,
    "c": 0.11783,
    "h": 260.7
  },
  "luminance": 0.05485
}

Semantic roles & 50–950 ramp

primary

#1B4081

secondary

#B58B43

accent

#AB3FE8

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B4081

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

Preview Lab → · Contrast checker → · Palette generator →