#1B409C#1B409C

#1B409C is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.6% C 0.156 H 264.0°. Best body text is #FFFFFF at 9.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B409C
RGB	rgb(27, 64, 156)
HSL	hsl(223, 70%, 36%)
HSV	hsv(223, 83%, 61%)
CMYK	cmyk(82.7%, 59%, 0%, 38.8%)
CIE-LAB	lab(30.15, 22.74, -53.71)
CIE-LCH	lch(30.15, 58.32, 292.95°)
OKLab	oklab(40.62% -0.0162 -0.1552)
OKLCH	oklch(40.62% 0.156 264)
XYZ	xyz(8.2840, 6.2991, 32.2253)
Luminance	0.0630 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B409C #9C771B

analogous

#1B809C #1B409C #371B9C

triadic

#1B409C #9C1B40 #409C1B

tetradic

#1B409C #9C1B80 #9C771B #1B9C37

square

#1B409C #9C1B80 #9C771B #1B9C37

split-complementary

#1B409C #9C371B #809C1B

monochromatic

#091534 #122B68 #1B409C #2455D0 #517AE1

Accessibility & contrast

On white

9.29

#1B409C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1B409C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B409C

9.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B409C	#FFFFFF	#000000	##FFFFFF
##1B409C	1.00	9.29	2.26	9.29
#FFFFFF	9.29	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9F

Deuteranopia (green-blind)

#00419A

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b409c;
/* rgb */ color: rgb(27, 64, 156);
/* oklch */ color: oklch(40.6% 0.156 264.0);

Tailwind

colors: {
  custom: {
    50: '#6f74ba',
    500: '#1b409c',
    950: '#000000',
  },
}

SCSS

$custom: #1b409c;
$custom-light: #6f74ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b409c",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 156
  },
  "hsl": {
    "h": 222.791,
    "s": 70.492,
    "l": 35.882
  },
  "oklch": {
    "l": 0.40617,
    "c": 0.15607,
    "h": 264
  },
  "luminance": 0.063
}

Semantic roles & 50–950 ramp

primary

#1B409C

secondary

#C3A24F

accent

#BA3BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B409C

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

Preview Lab → · Contrast checker → · Palette generator →