#1B4E9E#1B4E9E

#1B4E9E is a dark, vivid blue. Relative luminance 0.082; OKLCH L 43.8% C 0.141 H 259.4°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E9E
RGB	rgb(27, 78, 158)
HSL	hsl(217, 71%, 36%)
HSV	hsv(217, 83%, 62%)
CMYK	cmyk(82.9%, 50.6%, 0%, 38%)
CIE-LAB	lab(34.29, 14.00, -48.20)
CIE-LCH	lch(34.29, 50.19, 286.20°)
OKLab	oklab(43.8% -0.0259 -0.1388)
OKLCH	oklch(43.8% 0.141 259.4)
XYZ	xyz(9.3457, 8.1493, 33.4215)
Luminance	0.0815 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E9E #9E6B1B

analogous

#1B909E #1B4E9E #291B9E

triadic

#1B4E9E #9E1B4E #4E9E1B

tetradic

#1B4E9E #9E1B90 #9E6B1B #1B9E29

square

#1B4E9E #9E1B90 #9E6B1B #1B9E29

split-complementary

#1B4E9E #9E291B #909E1B

monochromatic

#091A35 #12346A #1B4E9E #2468D2 #528AE1

Accessibility & contrast

On white

7.98

#1B4E9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#1B4E9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E9E

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E9E	#FFFFFF	#000000	##FFFFFF
##1B4E9E	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C57A1

Deuteranopia (green-blind)

#004B9C

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4e9e;
/* rgb */ color: rgb(27, 78, 158);
/* oklch */ color: oklch(43.8% 0.141 259.4);

Tailwind

colors: {
  custom: {
    50: '#6e7ebb',
    500: '#1b4e9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e9e;
$custom-light: #6e7ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e9e",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 158
  },
  "hsl": {
    "h": 216.641,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43804,
    "c": 0.14115,
    "h": 259.4
  },
  "luminance": 0.0815
}

Semantic roles & 50–950 ramp

primary

#1B4E9E

secondary

#C49751

accent

#A83AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B4E9E

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

Preview Lab → · Contrast checker → · Palette generator →