#1B4CA5#1B4CA5

#1B4CA5 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.9% C 0.153 H 261.2°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B4CA5
RGB	rgb(27, 76, 165)
HSL	hsl(219, 72%, 38%)
HSV	hsv(219, 84%, 65%)
CMYK	cmyk(83.6%, 53.9%, 0%, 35.3%)
CIE-LAB	lab(34.23, 18.17, -52.51)
CIE-LCH	lch(34.23, 55.57, 289.09°)
OKLab	oklab(43.92% -0.0235 -0.1515)
OKLCH	oklch(43.92% 0.153 261.2)
XYZ	xyz(9.8255, 8.1173, 36.6390)
Luminance	0.0812 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4CA5 #A5741B

analogous

#1B91A5 #1B4CA5 #2F1BA5

triadic

#1B4CA5 #A51B4C #4CA51B

tetradic

#1B4CA5 #A51B91 #A5741B #1BA52F

square

#1B4CA5 #A51B91 #A5741B #1BA52F

split-complementary

#1B4CA5 #A52F1B #91A51B

monochromatic

#0A1C3C #123470 #1B4CA5 #2464DA #5789E3

Accessibility & contrast

On white

8.00

#1B4CA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#1B4CA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4CA5

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4CA5	#FFFFFF	#000000	##FFFFFF
##1B4CA5	1.00	8.00	2.62	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0257A8

Deuteranopia (green-blind)

#004BA3

Tritanopia (blue-blind)

#006271

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4ca5;
/* rgb */ color: rgb(27, 76, 165);
/* oklch */ color: oklch(43.9% 0.153 261.2);

Tailwind

colors: {
  custom: {
    50: '#707dc0',
    500: '#1b4ca5',
    950: '#000000',
  },
}

SCSS

$custom: #1b4ca5;
$custom-light: #707dc0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4ca5",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 165
  },
  "hsl": {
    "h": 218.696,
    "s": 71.875,
    "l": 37.647
  },
  "oklch": {
    "l": 0.43916,
    "c": 0.15331,
    "h": 261.2
  },
  "luminance": 0.08119
}

Semantic roles & 50–950 ramp

primary

#1B4CA5

secondary

#C79E55

accent

#AE39EF

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4CA5

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

Preview Lab → · Contrast checker → · Palette generator →