#1B4582#1B4582

#1B4582 is a dark, moderate blue. Relative luminance 0.061; OKLCH L 39.6% C 0.113 H 258.1°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#1B4582
RGB	rgb(27, 69, 130)
HSL	hsl(216, 66%, 31%)
HSV	hsv(216, 79%, 51%)
CMYK	cmyk(79.2%, 46.9%, 0%, 49%)
CIE-LAB	lab(29.66, 8.77, -38.53)
CIE-LCH	lch(29.66, 39.51, 282.82°)
OKLab	oklab(39.63% -0.0232 -0.1105)
OKLCH	oklch(39.63% 0.113 258.1)
XYZ	xyz(6.6079, 6.1002, 21.9440)
Luminance	0.0610 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4582 #82581B

analogous

#1B7882 #1B4582 #241B82

triadic

#1B4582 #821B45 #45821B

tetradic

#1B4582 #821B78 #82581B #1B8224

square

#1B4582 #821B78 #82581B #1B8224

split-complementary

#1B4582 #82241B #78821B

monochromatic

#060F1D #102A4F #1B4582 #2660B5 #407ED7

Accessibility & contrast

On white

9.46

#1B4582 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1B4582 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4582

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4582	#FFFFFF	#000000	##FFFFFF
##1B4582	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254B84

Deuteranopia (green-blind)

#0E4281

Tritanopia (blue-blind)

#00535D

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b4582;
/* rgb */ color: rgb(27, 69, 130);
/* oklch */ color: oklch(39.6% 0.113 258.1);

Tailwind

colors: {
  custom: {
    50: '#6878a7',
    500: '#1b4582',
    950: '#000000',
  },
}

SCSS

$custom: #1b4582;
$custom-light: #6878a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4582",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 130
  },
  "hsl": {
    "h": 215.534,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.39626,
    "c": 0.1129,
    "h": 258.1
  },
  "luminance": 0.06101
}

Semantic roles & 50–950 ramp

primary

#1B4582

secondary

#B68743

accent

#A43FE9

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B4582

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

Preview Lab → · Contrast checker → · Palette generator →