#1B4F99#1B4F99

#1B4F99 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.7% C 0.133 H 258.1°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F99
RGB	rgb(27, 79, 153)
HSL	hsl(215, 70%, 35%)
HSV	hsv(215, 82%, 60%)
CMYK	cmyk(82.4%, 48.4%, 0%, 40%)
CIE-LAB	lab(34.24, 11.31, -45.27)
CIE-LCH	lch(34.24, 46.66, 284.03°)
OKLab	oklab(43.65% -0.0274 -0.1301)
OKLCH	oklch(43.65% 0.133 258.1)
XYZ	xyz(8.9956, 8.1238, 31.2248)
Luminance	0.0813 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F99 #99651B

analogous

#1B8E99 #1B4F99 #261B99

triadic

#1B4F99 #991B4F #4F991B

tetradic

#1B4F99 #991B8E #99651B #1B9926

square

#1B4F99 #991B8E #99651B #1B9926

split-complementary

#1B4F99 #99261B #8E991B

monochromatic

#091931 #123465 #1B4F99 #246ACD #4F8BE0

Accessibility & contrast

On white

8.00

#1B4F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#1B4F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F99

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F99	#FFFFFF	#000000	##FFFFFF
##1B4F99	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25579C

Deuteranopia (green-blind)

#004B98

Tritanopia (blue-blind)

#00616C

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4f99;
/* rgb */ color: rgb(27, 79, 153);
/* oklch */ color: oklch(43.7% 0.133 258.1);

Tailwind

colors: {
  custom: {
    50: '#6d7fb7',
    500: '#1b4f99',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f99;
$custom-light: #6d7fb7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f99",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 153
  },
  "hsl": {
    "h": 215.238,
    "s": 70,
    "l": 35.294
  },
  "oklch": {
    "l": 0.43653,
    "c": 0.13297,
    "h": 258.1
  },
  "luminance": 0.08125
}

Semantic roles & 50–950 ramp

primary

#1B4F99

secondary

#C2924E

accent

#A33BED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1B4F99

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

Preview Lab → · Contrast checker → · Palette generator →