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64 Types of True Blue

John Spacey, July 06, 2021

True blue is a pure blue hue that isn't shaded with black, tinted with white or tinged with another color. Blue light is a component of sunlight that corresponds to wavelengths of light between about 490 and 430 nanometers. This is all about perception as longer wavelengths are perceived as green and shorter wavelengths as violet. The term true blue is also an English idiomatic phrase that means loyalty. The following is a complete list of the pure blue hues supported by common digital technologies based on the rgb color model. The wavelength of light is also given for each.

Blue 491 nm
#00fff5

Blue 490 nm
#00ffff

Blue 489 nm
#00fbff

Blue 488 nm
#00f7ff

Blue 487 nm
#00f3ff

Blue 486 nm
#00efff

Blue 485 nm
#00eaff

Blue 484 nm
#00e6ff

Blue 483 nm
#00e2ff

Blue 482 nm
#00deff

Blue 481 nm
#00daff

Blue 480 nm
#00d5ff

Blue 479 nm
#00d1ff

Blue 478 nm
#00cdff

Blue 477 nm
#00c8ff

Blue 476 nm
#00c4ff

Blue 475 nm
#00c0ff

Blue 474 nm
#00bbff

Blue 473 nm
#00b7ff

Blue 472 nm
#00b2ff

Blue 471 nm
#00aeff

Blue 470 nm
#00a9ff

Blue 469 nm
#00a5ff

Blue 468 nm
#00a0ff

Blue 467 nm
#009cff

Blue 466 nm
#0097ff

Blue 465 nm
#0092ff

Blue 464 nm
#008eff

Blue 463 nm
#0089ff

Blue 462 nm
#0084ff

Blue 461 nm
#007fff

Blue 460 nm
#007bff

Blue 459 nm
#0076ff

Blue 458 nm
#0071ff

Blue 457 nm
#006cff

Blue 456 nm
#0066ff

Blue 455 nm
#0061ff

Blue 454 nm
#005cff

Blue 453 nm
#0057ff

Blue 452 nm
#0051ff

Blue 451 nm
#004cff

Blue 450 nm
#0046ff

Blue 449 nm
#0041ff

Blue 448 nm
#003bff

Blue 447 nm
#0035ff

Blue 446 nm
#002fff

Blue 445 nm
#0028ff

Blue 444 nm
#0022ff

Blue 443 nm
#001bff

Blue 442 nm
#0013ff

Blue 441 nm
#000bff

Blue 440 nm
#0000ff

Blue 439 nm
#0a00ff

Blue 438 nm
#1100ff

Blue 437 nm
#1700ff

Blue 436 nm
#1d00ff

Blue 435 nm
#2300ff

Blue 434 nm
#2800ff

Blue 433 nm
#2e00ff

Blue 432 nm
#3300ff

Blue 431 nm
#3800ff

Blue 430 nm
#3d00ff

Blue 429 nm
#4200ff

Blue 428 nm
#4600ff

True Blue

The idiomatic phrase true blue meaning loyalty likely originated with the phase "true as Coventry blue" that was recorded by 1670. This referred to a high quality blue fabric from Coventry that apparently had lower quality imitations. With time, the meaning of true blue changed. As blue is a common color to symbolize political, social and religious orders, this likely emerged as a phase that indicated loyalty to a specific group that was later generalized.