#1B3E9B#1B3E9B

#1B3E9B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.157 H 264.5°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E9B
RGB	rgb(27, 62, 155)
HSL	hsl(224, 70%, 36%)
HSV	hsv(224, 83%, 61%)
CMYK	cmyk(82.6%, 60%, 0%, 39.2%)
CIE-LAB	lab(29.52, 23.71, -54.13)
CIE-LCH	lch(29.52, 59.10, 293.66°)
OKLab	oklab(40.12% -0.015 -0.1565)
OKLCH	oklch(40.12% 0.157 264.5)
XYZ	xyz(8.0889, 6.0438, 31.7442)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E9B #9B781B

analogous

#1B7E9B #1B3E9B #381B9B

triadic

#1B3E9B #9B1B3E #3E9B1B

tetradic

#1B3E9B #9B1B7E #9B781B #1B9B38

square

#1B3E9B #9B1B7E #9B781B #1B9B38

split-complementary

#1B3E9B #9B381B #7E9B1B

monochromatic

#091433 #122967 #1B3E9B #2453CF #5077E0

Accessibility & contrast

On white

9.51

#1B3E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B3E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E9B

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E9B	#FFFFFF	#000000	##FFFFFF
##1B3E9B	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b3e9b;
/* rgb */ color: rgb(27, 62, 155);
/* oklch */ color: oklch(40.1% 0.157 264.5);

Tailwind

colors: {
  custom: {
    50: '#6f72b9',
    500: '#1b3e9b',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e9b;
$custom-light: #6f72b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e9b",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 155
  },
  "hsl": {
    "h": 223.594,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.40117,
    "c": 0.15722,
    "h": 264.5
  },
  "luminance": 0.06045
}

Semantic roles & 50–950 ramp

primary

#1B3E9B

secondary

#C3A34F

accent

#BC3BED

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B3E9B

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

Preview Lab → · Contrast checker → · Palette generator →