#1B4F9D#1B4F9D

#1B4F9D is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.0% C 0.139 H 258.8°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F9D
RGB	rgb(27, 79, 157)
HSL	hsl(216, 71%, 36%)
HSV	hsv(216, 83%, 62%)
CMYK	cmyk(82.8%, 49.7%, 0%, 38.4%)
CIE-LAB	lab(34.51, 12.92, -47.24)
CIE-LCH	lch(34.51, 48.98, 285.30°)
OKLab	oklab(43.95% -0.0268 -0.1359)
OKLCH	oklch(43.95% 0.139 258.8)
XYZ	xyz(9.3315, 8.2582, 32.9939)
Luminance	0.0826 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F9D #9D691B

analogous

#1B909D #1B4F9D #281B9D

triadic

#1B4F9D #9D1B4F #4F9D1B

tetradic

#1B4F9D #9D1B90 #9D691B #1B9D28

square

#1B4F9D #9D1B90 #9D691B #1B9D28

split-complementary

#1B4F9D #9D281B #909D1B

monochromatic

#091A35 #123569 #1B4F9D #2469D1 #518BE1

Accessibility & contrast

On white

7.92

#1B4F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1B4F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F9D

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F9D	#FFFFFF	#000000	##FFFFFF
##1B4F9D	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2157A0

Deuteranopia (green-blind)

#004C9B

Tritanopia (blue-blind)

#00626E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4f9d;
/* rgb */ color: rgb(27, 79, 157);
/* oklch */ color: oklch(44.0% 0.139 258.8);

Tailwind

colors: {
  custom: {
    50: '#6e7fba',
    500: '#1b4f9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f9d;
$custom-light: #6e7fba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f9d",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 157
  },
  "hsl": {
    "h": 216,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43953,
    "c": 0.13853,
    "h": 258.8
  },
  "luminance": 0.08259
}

Semantic roles & 50–950 ramp

primary

#1B4F9D

secondary

#C49550

accent

#A63AED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B4F9D

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

Preview Lab → · Contrast checker → · Palette generator →