#1B2479#1B2479

#1B2479 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.8% C 0.143 H 270.7°. Best body text is #FFFFFF at 13.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B2479
RGB	rgb(27, 36, 121)
HSL	hsl(234, 64%, 29%)
HSV	hsv(234, 78%, 47%)
CMYK	cmyk(77.7%, 70.2%, 0%, 52.5%)
CIE-LAB	lab(19.54, 28.15, -49.31)
CIE-LCH	lch(19.54, 56.78, 299.72°)
OKLab	oklab(31.78% 0.0018 -0.1427)
OKLCH	oklch(31.78% 0.143 270.7)
XYZ	xyz(4.5329, 2.8748, 18.4014)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2479 #79701B

analogous

#1B5379 #1B2479 #411B79

triadic

#1B2479 #791B24 #24791B

tetradic

#1B2479 #791B53 #79701B #1B7941

square

#1B2479 #791B53 #79701B #1B7941

split-complementary

#1B2479 #79411B #53791B

monochromatic

#060719 #101547 #1B2479 #2633AB #3B4AD3

Accessibility & contrast

On white

13.33

#1B2479 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B2479 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2479

13.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2479	#FFFFFF	#000000	##FFFFFF
##1B2479	1.00	13.33	1.58	13.33
#FFFFFF	13.33	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347C

Deuteranopia (green-blind)

#002B77

Tritanopia (blue-blind)

#003B4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2479;
/* rgb */ color: rgb(27, 36, 121);
/* oklch */ color: oklch(31.8% 0.143 270.7);

Tailwind

colors: {
  custom: {
    50: '#685fa1',
    500: '#1b2479',
    950: '#000000',
  },
}

SCSS

$custom: #1b2479;
$custom-light: #685fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2479",
  "rgb": {
    "r": 27,
    "g": 36,
    "b": 121
  },
  "hsl": {
    "h": 234.255,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31777,
    "c": 0.14267,
    "h": 270.7
  },
  "luminance": 0.02875
}

Semantic roles & 50–950 ramp

primary

#1B2479

secondary

#ADA343

accent

#D741E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B2479

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

Preview Lab → · Contrast checker → · Palette generator →