#1B4580#1B4580

#1B4580 is a dark, moderate blue. Relative luminance 0.060; OKLCH L 39.5% C 0.110 H 257.6°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B4580
RGB	rgb(27, 69, 128)
HSL	hsl(215, 65%, 30%)
HSV	hsv(215, 79%, 50%)
CMYK	cmyk(78.9%, 46.1%, 0%, 49.8%)
CIE-LAB	lab(29.53, 7.95, -37.50)
CIE-LCH	lch(29.53, 38.33, 281.98°)
OKLab	oklab(39.48% -0.0236 -0.1074)
OKLCH	oklch(39.48% 0.11 257.6)
XYZ	xyz(6.4750, 6.0470, 21.2438)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4580 #80561B

analogous

#1B7780 #1B4580 #241B80

triadic

#1B4580 #801B45 #45801B

tetradic

#1B4580 #801B77 #80561B #1B8024

square

#1B4580 #801B77 #80561B #1B8024

split-complementary

#1B4580 #80241B #77801B

monochromatic

#060F1B #102A4D #1B4580 #2660B3 #3F7ED6

Accessibility & contrast

On white

9.50

#1B4580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B4580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4580

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4580	#FFFFFF	#000000	##FFFFFF
##1B4580	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274B82

Deuteranopia (green-blind)

#12417F

Tritanopia (blue-blind)

#00535C

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b4580;
/* rgb */ color: rgb(27, 69, 128);
/* oklch */ color: oklch(39.5% 0.110 257.6);

Tailwind

colors: {
  custom: {
    50: '#6778a5',
    500: '#1b4580',
    950: '#000000',
  },
}

SCSS

$custom: #1b4580;
$custom-light: #6778a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4580",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 128
  },
  "hsl": {
    "h": 215.05,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.3948,
    "c": 0.11001,
    "h": 257.6
  },
  "luminance": 0.06048
}

Semantic roles & 50–950 ramp

primary

#1B4580

secondary

#B48543

accent

#A240E8

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B4580

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

Preview Lab → · Contrast checker → · Palette generator →