#1B45B4#1B45B4

#1B45B4 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.8% C 0.182 H 264.2°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B45B4
RGB	rgb(27, 69, 180)
HSL	hsl(224, 74%, 41%)
HSV	hsv(224, 85%, 71%)
CMYK	cmyk(85%, 61.7%, 0%, 29.4%)
CIE-LAB	lab(33.53, 28.81, -62.59)
CIE-LCH	lch(33.53, 68.90, 294.72°)
OKLab	oklab(43.77% -0.0184 -0.1812)
OKLCH	oklch(43.77% 0.182 264.2)
XYZ	xyz(10.8154, 7.7832, 44.1034)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B45B4 #B48A1B

analogous

#1B92B4 #1B45B4 #3D1BB4

triadic

#1B45B4 #B41B45 #45B41B

tetradic

#1B45B4 #B41B92 #B48A1B #1BB43D

square

#1B45B4 #B41B92 #B48A1B #1BB43D

split-complementary

#1B45B4 #B43D1B #92B41B

monochromatic

#0B1C4A #13317F #1B45B4 #2D5EDF #6287E7

Accessibility & contrast

On white

8.21

#1B45B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#1B45B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B45B4

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B45B4	#FFFFFF	#000000	##FFFFFF
##1B45B4	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B8

Deuteranopia (green-blind)

#0048B2

Tritanopia (blue-blind)

#006276

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b45b4;
/* rgb */ color: rgb(27, 69, 180);
/* oklch */ color: oklch(43.8% 0.182 264.2);

Tailwind

colors: {
  custom: {
    50: '#7578cb',
    500: '#1b45b4',
    950: '#000000',
  },
}

SCSS

$custom: #1b45b4;
$custom-light: #7578cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b45b4",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 180
  },
  "hsl": {
    "h": 223.529,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.43768,
    "c": 0.18212,
    "h": 264.2
  },
  "luminance": 0.07785
}

Semantic roles & 50–950 ramp

primary

#1B45B4

secondary

#CCAE5F

accent

#BE37F1

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B45B4

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

Preview Lab → · Contrast checker → · Palette generator →