#1B2580#1B2580

#1B2580 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.7% C 0.151 H 270.2°. Best body text is #FFFFFF at 12.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B2580
RGB	rgb(27, 37, 128)
HSL	hsl(234, 65%, 30%)
HSV	hsv(234, 79%, 50%)
CMYK	cmyk(78.9%, 71.1%, 0%, 49.8%)
CIE-LAB	lab(20.50, 30.15, -52.18)
CIE-LCH	lch(20.50, 60.26, 300.02°)
OKLab	oklab(32.69% 0.0005 -0.151)
OKLCH	oklch(32.69% 0.151 270.2)
XYZ	xyz(5.0085, 3.1141, 20.7550)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2580 #80761B

analogous

#1B5880 #1B2580 #431B80

triadic

#1B2580 #801B25 #25801B

tetradic

#1B2580 #801B58 #80761B #1B8043

square

#1B2580 #801B58 #80761B #1B8043

split-complementary

#1B2580 #80431B #58801B

monochromatic

#06081B #10164D #1B2580 #2634B3 #3F4ED6

Accessibility & contrast

On white

12.94

#1B2580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1B2580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2580

12.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2580	#FFFFFF	#000000	##FFFFFF
##1B2580	1.00	12.94	1.62	12.94
#FFFFFF	12.94	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003683

Deuteranopia (green-blind)

#002D7E

Tritanopia (blue-blind)

#003E4F

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b2580;
/* rgb */ color: rgb(27, 37, 128);
/* oklch */ color: oklch(32.7% 0.151 270.2);

Tailwind

colors: {
  custom: {
    50: '#6a60a6',
    500: '#1b2580',
    950: '#000000',
  },
}

SCSS

$custom: #1b2580;
$custom-light: #6a60a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2580",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 128
  },
  "hsl": {
    "h": 234.059,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.3269,
    "c": 0.15104,
    "h": 270.2
  },
  "luminance": 0.03115
}

Semantic roles & 50–950 ramp

primary

#1B2580

secondary

#B4A943

accent

#D740E8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B2580

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

Preview Lab → · Contrast checker → · Palette generator →