#1B417B#1B417B

#1B417B is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.2% C 0.108 H 258.8°. Best body text is #FFFFFF at 10.05:1 contrast (WCAG AA passes).

Color values

HEX	#1B417B
RGB	rgb(27, 65, 123)
HSL	hsl(216, 64%, 29%)
HSV	hsv(216, 78%, 48%)
CMYK	cmyk(78%, 47.2%, 0%, 51.8%)
CIE-LAB	lab(27.96, 8.67, -36.89)
CIE-LCH	lch(27.96, 37.89, 283.22°)
OKLab	oklab(38.16% -0.0209 -0.1057)
OKLCH	oklch(38.16% 0.108 258.8)
XYZ	xyz(5.9161, 5.4430, 19.4739)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B417B #7B551B

analogous

#1B717B #1B417B #251B7B

triadic

#1B417B #7B1B41 #417B1B

tetradic

#1B417B #7B1B71 #7B551B #1B7B25

square

#1B417B #7B1B71 #7B551B #1B7B25

split-complementary

#1B417B #7B251B #717B1B

monochromatic

#060D19 #102649 #1B417B #265CAD #3C78D4

Accessibility & contrast

On white

10.05

#1B417B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1B417B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B417B

10.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B417B	#FFFFFF	#000000	##FFFFFF
##1B417B	1.00	10.05	2.09	10.05
#FFFFFF	10.05	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23477D

Deuteranopia (green-blind)

#0E3E7A

Tritanopia (blue-blind)

#004F58

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b417b;
/* rgb */ color: rgb(27, 65, 123);
/* oklch */ color: oklch(38.2% 0.108 258.8);

Tailwind

colors: {
  custom: {
    50: '#6675a1',
    500: '#1b417b',
    950: '#000000',
  },
}

SCSS

$custom: #1b417b;
$custom-light: #6675a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b417b",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 123
  },
  "hsl": {
    "h": 216.25,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.38161,
    "c": 0.10779,
    "h": 258.8
  },
  "luminance": 0.05444
}

Semantic roles & 50–950 ramp

primary

#1B417B

secondary

#AF8443

accent

#A541E7

background

#F6F7FA

surface

#EBEDF3

border

#C6C8CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B417B

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

Preview Lab → · Contrast checker → · Palette generator →