#1B45AE#1B45AE

#1B45AE is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.2% C 0.174 H 263.9°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B45AE
RGB	rgb(27, 69, 174)
HSL	hsl(223, 73%, 39%)
HSV	hsv(223, 84%, 68%)
CMYK	cmyk(84.5%, 60.3%, 0%, 31.8%)
CIE-LAB	lab(33.01, 26.47, -59.86)
CIE-LCH	lch(33.01, 65.45, 293.86°)
OKLab	oklab(43.23% -0.0185 -0.1732)
OKLCH	oklch(43.23% 0.174 263.9)
XYZ	xyz(10.2174, 7.5440, 40.9538)
Luminance	0.0755 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B45AE #AE841B

analogous

#1B8FAE #1B45AE #3B1BAE

triadic

#1B45AE #AE1B45 #45AE1B

tetradic

#1B45AE #AE1B8F #AE841B #1BAE3B

square

#1B45AE #AE1B8F #AE841B #1BAE3B

split-complementary

#1B45AE #AE3B1B #8FAE1B

monochromatic

#0B1B44 #133079 #1B45AE #285CDE #5D84E6

Accessibility & contrast

On white

8.37

#1B45AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B45AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B45AE

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B45AE	#FFFFFF	#000000	##FFFFFF
##1B45AE	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B1

Deuteranopia (green-blind)

#0047AC

Tritanopia (blue-blind)

#006072

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b45ae;
/* rgb */ color: rgb(27, 69, 174);
/* oklch */ color: oklch(43.2% 0.174 263.9);

Tailwind

colors: {
  custom: {
    50: '#7378c7',
    500: '#1b45ae',
    950: '#000000',
  },
}

SCSS

$custom: #1b45ae;
$custom-light: #7378c7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b45ae",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 174
  },
  "hsl": {
    "h": 222.857,
    "s": 73.134,
    "l": 39.412
  },
  "oklch": {
    "l": 0.43227,
    "c": 0.17419,
    "h": 263.9
  },
  "luminance": 0.07545
}

Semantic roles & 50–950 ramp

primary

#1B45AE

secondary

#CAAA5B

accent

#BB38F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B45AE

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

Preview Lab → · Contrast checker → · Palette generator →