#1D2731a cool blackened blue
#1D2731 in RGB, HSL, OKLCH & more
Ready to ship: every line pastes straight into your codebase, and the whole file copies at once.
ART is Rhapsody's perceptual model. How ART works
What kind of blue is #1D2731?
Every color has a place in the standard vocabulary. This is #1D2731's, measured rather than asserted.
#1D2731's Munsell numbers: hue 1.3PB, value 1.5 (how light), chroma 1.6 (how vivid). That places it in ISCC-NBS block blackish blue, one of 267 named ranges the standard sorts every color into. Chroma 1.6 is low. This is a greyed, muted blue, nearer neutral than vivid, which is why it reads as a surface rather than an accent.
There's still some room before it hits the edge of what your screen can show for this hue. It could go a little more saturated and stay in gamut.
Munsell coordinates and block from the ISCC-NBS system, computed by Rhapsody's own renotation inversion.
Shades of #1D2731, lighter and darker
For hover states, washed backgrounds, and dark surfaces that still read as #1D2731. 13 steps, spaced evenly by eye, with the color itself sitting at its natural depth, blue-950.
Tints (light surfaces; dark text passes on every one)
Midtones (the color at full strength, for brand & accent work)
Shades (dark surfaces; light text passes on every one)
Most tools mix. Rhapsody measures.
Paste any color. The whole system comes back, contrast-checked before you see it.
The window on the right was generated from #1D2731, like this whole page.
Is #1D2731 accessible? Contrast with white & black
Strong contrast makes your work readable by everyone, and meets the WCAG standard accessibility law points at. AA is the floor; AAA is the tier worth aiming for in body text. White text on #1D2731 clears WCAG AAA. Every strip below is one surface, and the marks are the steps that reach AAA on it.
Rows are text, columns are background · 58 of 210 pairings reach WCAG 2.2 AAA, shown here.
Ship the audit, not screenshots.
Run #1D2731 against the colors you actually ship, every pairing and any target, and export it: exact ratios, the AA tier, APCA, in one file.
The audit on the right was calibrated from #1D2731, like this whole page.
#1D2731 in CMYK: one value for files, one per press
Presses move this color a little, by less than a print run varies anyway, so a printer would call it a match. The pairs below show where each standard lands.
In CMYK, #1D2731 is . That is the value design tools and file formats use when no press is involved.
On press (what each standard prints)
shifts ΔE00 21.3, 8.5× the 2.5 a run varies by
shifts ΔE00 13.5, 5.4× the 2.5 a run varies by
shifts ΔE00 1.7, under the 2.5 a press run varies by
Press values computed through the ICC characterization data each standard proofs against. Each CMYK above is the closest that standard can get, near enough that a press run's own variation is the larger difference.
No surprises at the printer.
Run any color through the major press standards: FOGRA51, GRACoL, Japan Color, FOGRA39. It's coming soon. Create a free account and you'll get a note the moment it's live.
The strip shows this page's tints and shades on screen, then through a standard GRACoL 2013 conversion.
Colors similar to #1D2731
This color sits solidly in the middle of The Blues. Explore The Blues
The cool pole itself sits in this stretch of the wheel.
Named colors near this one: Abyssal Anchorfish Blue #1B2632 (via color-name-list) · Infinity #222831 (via color-name-list) · Black Pearl #1E272C (via color-name-list) · dark #1B2431 (via XKCD) · Black Grey #24272E (via color-name-list)
Colors that go with #1D2731
The complementary color, straight across the wheel, is a warm muted scarlet #BE816A. Rhapsody's pick is the split complement, just to one side of it, a livelier pair.
The accent is for the moments that need attention, the harmony for the ones that need calm; the vivid is the same color with the volume up, for when it has to shout.
Take #1D2731 with you
The work on this page doesn't stay here. Save a card and the color arrives in your file, your deck or your board already decided.
Your system is already built.
Rhapsody built it before you even asked: the scale, the neutrals, the utilities, every pairing calibrated.
This page's whole theme is built from one color. Palette does the same for yours: every step calibrated, every pairing checked, press included.
Every color on this page was calibrated, not mixed.
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