#1B40A7#1B40A7

#1B40A7 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.6% C 0.171 H 264.7°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B40A7
RGB	rgb(27, 64, 167)
HSL	hsl(224, 72%, 38%)
HSV	hsv(224, 84%, 65%)
CMYK	cmyk(83.8%, 61.7%, 0%, 34.5%)
CIE-LAB	lab(31.09, 27.09, -58.82)
CIE-LCH	lch(31.09, 64.76, 294.73°)
OKLab	oklab(41.6% -0.0159 -0.1702)
OKLCH	oklch(41.6% 0.171 264.7)
XYZ	xyz(9.2580, 6.6887, 37.3548)
Luminance	0.0669 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B40A7 #A7821B

analogous

#1B86A7 #1B40A7 #3C1BA7

triadic

#1B40A7 #A71B40 #40A71B

tetradic

#1B40A7 #A71B86 #A7821B #1BA73C

square

#1B40A7 #A71B86 #A7821B #1BA73C

split-complementary

#1B40A7 #A73C1B #86A71B

monochromatic

#0A183E #122C72 #1B40A7 #2454DC #587DE4

Accessibility & contrast

On white

8.98

#1B40A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1B40A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B40A7

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B40A7	#FFFFFF	#000000	##FFFFFF
##1B40A7	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AA

Deuteranopia (green-blind)

#0043A5

Tritanopia (blue-blind)

#005B6D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b40a7;
/* rgb */ color: rgb(27, 64, 167);
/* oklch */ color: oklch(41.6% 0.171 264.7);

Tailwind

colors: {
  custom: {
    50: '#7274c2',
    500: '#1b40a7',
    950: '#000000',
  },
}

SCSS

$custom: #1b40a7;
$custom-light: #7274c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b40a7",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 167
  },
  "hsl": {
    "h": 224.143,
    "s": 72.165,
    "l": 38.039
  },
  "oklch": {
    "l": 0.41603,
    "c": 0.17097,
    "h": 264.7
  },
  "luminance": 0.0669
}

Semantic roles & 50–950 ramp

primary

#1B40A7

secondary

#C8AA56

accent

#BF39EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B40A7

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

Preview Lab → · Contrast checker → · Palette generator →