#1B409A#1B409A

#1B409A is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.4% C 0.153 H 263.9°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#1B409A
RGB	rgb(27, 64, 154)
HSL	hsl(223, 70%, 35%)
HSV	hsv(223, 82%, 60%)
CMYK	cmyk(82.5%, 58.4%, 0%, 39.6%)
CIE-LAB	lab(29.99, 21.94, -52.76)
CIE-LCH	lch(29.99, 57.14, 292.58°)
OKLab	oklab(40.44% -0.0164 -0.1524)
OKLCH	oklch(40.44% 0.153 263.9)
XYZ	xyz(8.1160, 6.2319, 31.3407)
Luminance	0.0623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B409A #9A751B

analogous

#1B7F9A #1B409A #361B9A

triadic

#1B409A #9A1B40 #409A1B

tetradic

#1B409A #9A1B7F #9A751B #1B9A36

square

#1B409A #9A1B7F #9A751B #1B9A36

split-complementary

#1B409A #9A361B #7F9A1B

monochromatic

#091532 #122A66 #1B409A #2456CE #4F79E0

Accessibility & contrast

On white

9.35

#1B409A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1B409A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B409A

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B409A	#FFFFFF	#000000	##FFFFFF
##1B409A	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9D

Deuteranopia (green-blind)

#004198

Tritanopia (blue-blind)

#005766

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b409a;
/* rgb */ color: rgb(27, 64, 154);
/* oklch */ color: oklch(40.4% 0.153 263.9);

Tailwind

colors: {
  custom: {
    50: '#6e74b9',
    500: '#1b409a',
    950: '#000000',
  },
}

SCSS

$custom: #1b409a;
$custom-light: #6e74b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b409a",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 154
  },
  "hsl": {
    "h": 222.52,
    "s": 70.166,
    "l": 35.49
  },
  "oklch": {
    "l": 0.40441,
    "c": 0.15332,
    "h": 263.9
  },
  "luminance": 0.06233
}

Semantic roles & 50–950 ramp

primary

#1B409A

secondary

#C3A14E

accent

#B93BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B409A

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

Preview Lab → · Contrast checker → · Palette generator →