#1B45AD#1B45AD

#1B45AD is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.1% C 0.173 H 263.8°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B45AD
RGB	rgb(27, 69, 173)
HSL	hsl(223, 73%, 39%)
HSV	hsv(223, 84%, 68%)
CMYK	cmyk(84.4%, 60.1%, 0%, 32.2%)
CIE-LAB	lab(32.93, 26.08, -59.40)
CIE-LCH	lch(32.93, 64.88, 293.70°)
OKLab	oklab(43.14% -0.0185 -0.1718)
OKLCH	oklch(43.14% 0.173 263.8)
XYZ	xyz(10.1202, 7.5051, 40.4423)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B45AD #AD831B

analogous

#1B8EAD #1B45AD #3A1BAD

triadic

#1B45AD #AD1B45 #45AD1B

tetradic

#1B45AD #AD1B8E #AD831B #1BAD3A

square

#1B45AD #AD1B8E #AD831B #1BAD3A

split-complementary

#1B45AD #AD3A1B #8EAD1B

monochromatic

#0A1B43 #133078 #1B45AD #285CDD #5D84E6

Accessibility & contrast

On white

8.40

#1B45AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1B45AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B45AD

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B45AD	#FFFFFF	#000000	##FFFFFF
##1B45AD	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B0

Deuteranopia (green-blind)

#0047AB

Tritanopia (blue-blind)

#006072

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b45ad;
/* rgb */ color: rgb(27, 69, 173);
/* oklch */ color: oklch(43.1% 0.173 263.8);

Tailwind

colors: {
  custom: {
    50: '#7378c6',
    500: '#1b45ad',
    950: '#000000',
  },
}

SCSS

$custom: #1b45ad;
$custom-light: #7378c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b45ad",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 173
  },
  "hsl": {
    "h": 222.74,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.43138,
    "c": 0.17285,
    "h": 263.8
  },
  "luminance": 0.07506
}

Semantic roles & 50–950 ramp

primary

#1B45AD

secondary

#CAAA5A

accent

#BB38F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B45AD

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

Preview Lab → · Contrast checker → · Palette generator →