#1B4A9F#1B4A9F

#1B4A9F is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.0% C 0.148 H 261.1°. Best body text is #FFFFFF at 8.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A9F
RGB	rgb(27, 74, 159)
HSL	hsl(219, 71%, 36%)
HSV	hsv(219, 83%, 62%)
CMYK	cmyk(83%, 53.5%, 0%, 37.6%)
CIE-LAB	lab(33.21, 17.12, -50.56)
CIE-LCH	lch(33.21, 53.38, 288.70°)
OKLab	oklab(43% -0.0228 -0.1458)
OKLCH	oklch(43% 0.148 261.1)
XYZ	xyz(9.1565, 7.6327, 33.7848)
Luminance	0.0763 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A9F #9F701B

analogous

#1B8C9F #1B4A9F #2E1B9F

triadic

#1B4A9F #9F1B4A #4A9F1B

tetradic

#1B4A9F #9F1B8C #9F701B #1B9F2E

square

#1B4A9F #9F1B8C #9F701B #1B9F2E

split-complementary

#1B4A9F #9F2E1B #8C9F1B

monochromatic

#091936 #12326B #1B4A9F #2462D3 #5386E2

Accessibility & contrast

On white

8.31

#1B4A9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#1B4A9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A9F

8.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A9F	#FFFFFF	#000000	##FFFFFF
##1B4A9F	1.00	8.31	2.53	8.31
#FFFFFF	8.31	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0954A2

Deuteranopia (green-blind)

#00489D

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4a9f;
/* rgb */ color: rgb(27, 74, 159);
/* oklch */ color: oklch(43.0% 0.148 261.1);

Tailwind

colors: {
  custom: {
    50: '#6f7bbc',
    500: '#1b4a9f',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a9f;
$custom-light: #6f7bbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a9f",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 159
  },
  "hsl": {
    "h": 218.636,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.42998,
    "c": 0.14756,
    "h": 261.1
  },
  "luminance": 0.07634
}

Semantic roles & 50–950 ramp

primary

#1B4A9F

secondary

#C59C51

accent

#AE3AEE

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4A9F

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

Preview Lab → · Contrast checker → · Palette generator →