#1B4B9E#1B4B9E

#1B4B9E is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.1% C 0.145 H 260.6°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B9E
RGB	rgb(27, 75, 158)
HSL	hsl(218, 71%, 36%)
HSV	hsv(218, 83%, 62%)
CMYK	cmyk(82.9%, 52.5%, 0%, 38%)
CIE-LAB	lab(33.42, 16.03, -49.61)
CIE-LCH	lch(33.42, 52.14, 287.91°)
OKLab	oklab(43.14% -0.0236 -0.143)
OKLCH	oklch(43.14% 0.145 260.6)
XYZ	xyz(9.1374, 7.7327, 33.3521)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B9E #9E6E1B

analogous

#1B8D9E #1B4B9E #2C1B9E

triadic

#1B4B9E #9E1B4B #4B9E1B

tetradic

#1B4B9E #9E1B8D #9E6E1B #1B9E2C

square

#1B4B9E #9E1B8D #9E6E1B #1B9E2C

split-complementary

#1B4B9E #9E2C1B #8D9E1B

monochromatic

#091935 #12326A #1B4B9E #2464D2 #5287E1

Accessibility & contrast

On white

8.25

#1B4B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1B4B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B9E

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B9E	#FFFFFF	#000000	##FFFFFF
##1B4B9E	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1155A1

Deuteranopia (green-blind)

#00499C

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b4b9e;
/* rgb */ color: rgb(27, 75, 158);
/* oklch */ color: oklch(43.1% 0.145 260.6);

Tailwind

colors: {
  custom: {
    50: '#6f7cbb',
    500: '#1b4b9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b9e;
$custom-light: #6f7cbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b9e",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 158
  },
  "hsl": {
    "h": 218.015,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43137,
    "c": 0.14492,
    "h": 260.6
  },
  "luminance": 0.07734
}

Semantic roles & 50–950 ramp

primary

#1B4B9E

secondary

#C49A51

accent

#AC3AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4B9E

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

Preview Lab → · Contrast checker → · Palette generator →