#006995Hydra (#006995) is a dark, soft sky blue with an OKLCH hue of 236°, lightness 0.49 and chroma 0.106. It sits on the cool side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #006995 |
|---|---|
| RGB | rgb(0, 105, 149) |
| HSL | hsl(198, 100%, 29%) |
| HSV | hsv(198, 100%, 58%) |
| CMYK | cmyk(100%, 30%, 0%, 42%) |
| CIE Lab | lab(41.6 -8.8 -31.1) |
| OKLCH | oklch(0.493 0.106 236) |
Under warm 2700K interior light Hydra shifts subtly: loses intensity; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1.7), so it is a lighting-stable choice.
#21678c — ΔE 1.7, shifts subtly: loses intensity#156a92 — ΔE 0.9, is virtually unchanged#006995 — ΔE 0.0, is virtually unchanged#006997 — ΔE 0.3, is virtually unchangedTest Hydra in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.
Against white it measures 6.08:1 and against black 3.45:1, so white text is the stronger pairing. That pairing passes WCAG AA for body text.
One color explored: close hues with real lightness and chroma structure, so the palette is the anchor through value rather than a set of colors.
#83bde2 · #5397bf · #006995 · #004e70 · #002c42 · #000e1a
The anchor's neighbours on the wheel — everything shares an undertone, so the chord carries color without anything having to be muted to get along.
#3c929b · #197f99 · #006995 · #225285 · #2c3d70 · #2d2959
The mid-gap pairing — sage and mustard, terracotta and olive. A foil rotated 40–65° toward warm or cool: too far to be kin, too near to argue, carried by temperature and a deliberate value offset.
#b9b6e0 · #9991da · #7c799c · #006995 · #004c6d · #003048
One deliberately opposed voice — a single restrained counterpoint across the wheel, or temperature against temperature where the anchor is too muted to carry a loud opposite.
#df9a67 · #6f8492 · #006995 · #21485e · #062b3d · #00101c
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#faefe8 · #a8b7c1 · #817975 · #006995 · #3b4b55 · #030100
This color as a ground rather than a subject — its own restraint held across a narrow value band, carrying one saturated voice from the opposite temperature.
#fbefe8 · #d6c9c1 · #ae9f95 · #3d2c20 · #1a0a01 · #006995
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#d2d7b1 · #8abcb4 · #f5402e · #006995 · #664153 · #03082d
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffeee3 · #e6a098 · #977622 · #006995 · #71322e · #0a0400
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffecf2 · #e19eb6 · #788331 · #006995 · #464e03 · #0c0003
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#feebfe · #d2a2d2 · #aa6937 · #006995 · #225529 · #1a0600
#3980A8 · #5D98BB · #7EAFCE · #A0C7E1 · #C1E0F4
#00577D · #004665 · #00354E · #002539 · #001625
#2A688A · #3D677F · #4C6574
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.