Morph library / Base colour
Red Base
A red to orange-red base, when a gecko has two copies.
Shows on the whole body.Recessive: it takes two copies to show.
Try it in the builder
What it looks like
Red Base is recessive: it shows only with two copies (r/r). Under Black Base a single copy is hidden, though a pink or red blush on the cheeks can hint at it.
Red Base shares a gene slot with Black Base, so a gecko is B/B, B/r or r/r.
This page shows Red Base drawn from its genes. For the written reference, inheritance tables and breeder notes, see the crested gecko morph guide on ReptiDex.
Side by side
Red Base (r/r)
Open in the builder
One copy under black (B/r)
Open in the builder
With other genes
Hypo on Red Base makes Pink
Hypo lightens red into pinks.
Before 
After Yellow on Red Base reads as Orange
Yellow on top of a red base gives orange.
Before 
After
In depth
Produces red/orange base coloration when homozygous. Recessive inheritance. Heterozygous animals may show blush (pink/red coloration on cheeks) as a reliable het marker. Blush is one of the few confirmed het markers in crested geckos. Creates Pink combo morph when combined with Hypo.
How to spot it
Blush (pink/red coloration on cheeks) is a proven marker for heterozygous red base. One of the few reliable het markers in the species. Homozygous Red Base animals show red/orange coloration.
Where it came from
Red Base was identified through breeding trials and selective line development.
How it is inherited
Recessive: it takes two copies to show.
Written as r+ and r
Blush is a reliable het marker for Red Base. Homozygous Red Base recessive. Source: Foundation Genetics Part 1, 2.0.
Beside other genes
Red Base and Hypo strengthen each other
Hypo + Red Base creates Pink combo morph through epistatic color change (red becomes neon red to cotton candy pink).
Morphs it takes part in
Orangetakes some work
Orange to orange-red base coloration. Warmer and more saturated than Yellow Base alone. Intensity varies with expression of both alleles. Most vivid when fired up. Distinct from Red Base: orange tones rather than deep red or burgundy.
Needs Yellow Base, Red Base.
Pinktakes some work
Neon red to cotton candy pink coloration. Intensity varies with Red Base expression level.
Needs Red Base, Hypo.
Strawberry Blondetakes some work
Warm strawberry to coral-blonde coloration. Red Base provides the warm red undertone and Tangerine adds orange saturation. Softer and warmer than standard orange Tangerine.
Needs Red Base, Tangerine.