#1B40A8#1B40A8

#1B40A8 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.7% C 0.172 H 264.7°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#1B40A8
RGB	rgb(27, 64, 168)
HSL	hsl(224, 72%, 38%)
HSV	hsv(224, 84%, 66%)
CMYK	cmyk(83.9%, 61.9%, 0%, 34.1%)
CIE-LAB	lab(31.17, 27.48, -59.28)
CIE-LCH	lch(31.17, 65.34, 294.87°)
OKLab	oklab(41.7% -0.0159 -0.1716)
OKLCH	oklch(41.7% 0.172 264.7)
XYZ	xyz(9.3508, 6.7258, 37.8436)
Luminance	0.0673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B40A8 #A8831B

analogous

#1B86A8 #1B40A8 #3C1BA8

triadic

#1B40A8 #A81B40 #40A81B

tetradic

#1B40A8 #A81B86 #A8831B #1BA83C

square

#1B40A8 #A81B86 #A8831B #1BA83C

split-complementary

#1B40A8 #A83C1B #86A81B

monochromatic

#0A183F #132C73 #1B40A8 #2454DC #597EE4

Accessibility & contrast

On white

8.95

#1B40A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#1B40A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B40A8

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B40A8	#FFFFFF	#000000	##FFFFFF
##1B40A8	1.00	8.95	2.35	8.95
#FFFFFF	8.95	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#005B6E

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b40a8;
/* rgb */ color: rgb(27, 64, 168);
/* oklch */ color: oklch(41.7% 0.172 264.7);

Tailwind

colors: {
  custom: {
    50: '#7274c3',
    500: '#1b40a8',
    950: '#000000',
  },
}

SCSS

$custom: #1b40a8;
$custom-light: #7274c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b40a8",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 168
  },
  "hsl": {
    "h": 224.255,
    "s": 72.308,
    "l": 38.235
  },
  "oklch": {
    "l": 0.41695,
    "c": 0.17231,
    "h": 264.7
  },
  "luminance": 0.06727
}

Semantic roles & 50–950 ramp

primary

#1B40A8

secondary

#C8AA57

accent

#BF39EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1B40A8

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

Preview Lab → · Contrast checker → · Palette generator →