#1B3E9C#1B3E9C

#1B3E9C is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.159 H 264.6°. Best body text is #FFFFFF at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E9C
RGB	rgb(27, 62, 156)
HSL	hsl(224, 70%, 36%)
HSV	hsv(224, 83%, 61%)
CMYK	cmyk(82.7%, 60.3%, 0%, 38.8%)
CIE-LAB	lab(29.61, 24.11, -54.60)
CIE-LCH	lch(29.61, 59.68, 293.82°)
OKLab	oklab(40.21% -0.015 -0.1579)
OKLCH	oklch(40.21% 0.159 264.6)
XYZ	xyz(8.1732, 6.0776, 32.1884)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E9C #9C791B

analogous

#1B7E9C #1B3E9C #381B9C

triadic

#1B3E9C #9C1B3E #3E9C1B

tetradic

#1B3E9C #9C1B7E #9C791B #1B9C38

square

#1B3E9C #9C1B7E #9C791B #1B9C38

split-complementary

#1B3E9C #9C381B #7E9C1B

monochromatic

#091534 #122968 #1B3E9C #2453D0 #5178E1

Accessibility & contrast

On white

9.48

#1B3E9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1B3E9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E9C

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E9C	#FFFFFF	#000000	##FFFFFF
##1B3E9C	1.00	9.48	2.22	9.48
#FFFFFF	9.48	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9F

Deuteranopia (green-blind)

#00409A

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b3e9c;
/* rgb */ color: rgb(27, 62, 156);
/* oklch */ color: oklch(40.2% 0.159 264.6);

Tailwind

colors: {
  custom: {
    50: '#6f72ba',
    500: '#1b3e9c',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e9c;
$custom-light: #6f72ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e9c",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 156
  },
  "hsl": {
    "h": 223.721,
    "s": 70.492,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40206,
    "c": 0.15858,
    "h": 264.6
  },
  "luminance": 0.06079
}

Semantic roles & 50–950 ramp

primary

#1B3E9C

secondary

#C3A44F

accent

#BD3BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B3E9C

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

Preview Lab → · Contrast checker → · Palette generator →