#1B2983#1B2983

#1B2983 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.7% C 0.150 H 269.2°. Best body text is #FFFFFF at 12.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B2983
RGB	rgb(27, 41, 131)
HSL	hsl(232, 66%, 31%)
HSV	hsv(232, 79%, 51%)
CMYK	cmyk(79.4%, 68.7%, 0%, 48.6%)
CIE-LAB	lab(21.79, 28.62, -51.95)
CIE-LCH	lch(21.79, 59.31, 298.86°)
OKLab	oklab(33.72% -0.002 -0.1504)
OKLCH	oklch(33.72% 0.15 269.2)
XYZ	xyz(5.3403, 3.4570, 21.8541)
Luminance	0.0346 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2983 #83751B

analogous

#1B5D83 #1B2983 #411B83

triadic

#1B2983 #831B29 #29831B

tetradic

#1B2983 #831B5D #83751B #1B8341

square

#1B2983 #831B5D #83751B #1B8341

split-complementary

#1B2983 #83411B #5D831B

monochromatic

#06091E #111950 #1B2983 #2539B6 #4155D8

Accessibility & contrast

On white

12.41

#1B2983 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B2983 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2983

12.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2983	#FFFFFF	#000000	##FFFFFF
##1B2983	1.00	12.41	1.69	12.41
#FFFFFF	12.41	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003986

Deuteranopia (green-blind)

#002F81

Tritanopia (blue-blind)

#004152

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2983;
/* rgb */ color: rgb(27, 41, 131);
/* oklch */ color: oklch(33.7% 0.150 269.2);

Tailwind

colors: {
  custom: {
    50: '#6a63a8',
    500: '#1b2983',
    950: '#000000',
  },
}

SCSS

$custom: #1b2983;
$custom-light: #6a63a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2983",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 131
  },
  "hsl": {
    "h": 231.923,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33721,
    "c": 0.15036,
    "h": 269.2
  },
  "luminance": 0.03458
}

Semantic roles & 50–950 ramp

primary

#1B2983

secondary

#B6A743

accent

#D23FE9

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#080510

muted

#7A797F

Preview Lab

Preview with #1B2983

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

Preview Lab → · Contrast checker → · Palette generator →