#1B2279#1B2279

#1B2279 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.4% C 0.145 H 271.2°. Best body text is #FFFFFF at 13.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B2279
RGB	rgb(27, 34, 121)
HSL	hsl(236, 64%, 29%)
HSV	hsv(236, 78%, 47%)
CMYK	cmyk(77.7%, 71.9%, 0%, 52.5%)
CIE-LAB	lab(19.04, 29.48, -50.12)
CIE-LCH	lch(19.04, 58.15, 300.47°)
OKLab	oklab(31.42% 0.003 -0.145)
OKLCH	oklch(31.42% 0.145 271.2)
XYZ	xyz(4.4740, 2.7571, 18.3818)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2279 #79721B

analogous

#1B5179 #1B2279 #431B79

triadic

#1B2279 #791B22 #22791B

tetradic

#1B2279 #791B51 #79721B #1B7943

square

#1B2279 #791B51 #79721B #1B7943

split-complementary

#1B2279 #79431B #51791B

monochromatic

#060719 #101447 #1B2279 #2630AB #3B46D3

Accessibility & contrast

On white

13.53

#1B2279 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B2279 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2279

13.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2279	#FFFFFF	#000000	##FFFFFF
##1B2279	1.00	13.53	1.55	13.53
#FFFFFF	13.53	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337C

Deuteranopia (green-blind)

#002A77

Tritanopia (blue-blind)

#003A4A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2279;
/* rgb */ color: rgb(27, 34, 121);
/* oklch */ color: oklch(31.4% 0.145 271.2);

Tailwind

colors: {
  custom: {
    50: '#685da1',
    500: '#1b2279',
    950: '#000000',
  },
}

SCSS

$custom: #1b2279;
$custom-light: #685da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2279",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 121
  },
  "hsl": {
    "h": 235.532,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31421,
    "c": 0.14505,
    "h": 271.2
  },
  "luminance": 0.02758
}

Semantic roles & 50–950 ramp

primary

#1B2279

secondary

#ADA543

accent

#DA41E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B2279

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

Preview Lab → · Contrast checker → · Palette generator →