#1B2980#1B2980

#1B2980 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.4% C 0.146 H 269.3°. Best body text is #FFFFFF at 12.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B2980
RGB	rgb(27, 41, 128)
HSL	hsl(232, 65%, 30%)
HSV	hsv(232, 79%, 50%)
CMYK	cmyk(78.9%, 68%, 0%, 49.8%)
CIE-LAB	lab(21.49, 27.47, -50.54)
CIE-LCH	lch(21.49, 57.52, 298.52°)
OKLab	oklab(33.42% -0.0018 -0.1462)
OKLCH	oklch(33.42% 0.146 269.3)
XYZ	xyz(5.1399, 3.3768, 20.7988)
Luminance	0.0338 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2980 #80721B

analogous

#1B5B80 #1B2980 #3F1B80

triadic

#1B2980 #801B29 #29801B

tetradic

#1B2980 #801B5B #80721B #1B803F

square

#1B2980 #801B5B #80721B #1B803F

split-complementary

#1B2980 #803F1B #5B801B

monochromatic

#06091B #10194D #1B2980 #2639B3 #3F54D6

Accessibility & contrast

On white

12.53

#1B2980 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B2980 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2980

12.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2980	#FFFFFF	#000000	##FFFFFF
##1B2980	1.00	12.53	1.68	12.53
#FFFFFF	12.53	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003883

Deuteranopia (green-blind)

#002F7E

Tritanopia (blue-blind)

#004050

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2980;
/* rgb */ color: rgb(27, 41, 128);
/* oklch */ color: oklch(33.4% 0.146 269.3);

Tailwind

colors: {
  custom: {
    50: '#6962a6',
    500: '#1b2980',
    950: '#000000',
  },
}

SCSS

$custom: #1b2980;
$custom-light: #6962a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2980",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 128
  },
  "hsl": {
    "h": 231.683,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.33417,
    "c": 0.14624,
    "h": 269.3
  },
  "luminance": 0.03377
}

Semantic roles & 50–950 ramp

primary

#1B2980

secondary

#B4A443

accent

#D140E8

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2980

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

Preview Lab → · Contrast checker → · Palette generator →