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Source: Roblox Creator Hub · CC BY 4.0 · View source · Code samples: MIT Imported 2026-10-03. Formatting adapted for this site.

ColorSequence

The ColorSequence data type represents a gradient of color values from 0 to 1. The color values are expressed using the ColorSequenceKeypoint type. This type is used in various properties of ParticleEmitter, Trail, Beam, and other objects that use color gradients.

Equality

Two ColorSequence objects are equivalent only if the values of their ColorSequenceKeypoint are equivalent, even if both would result in similar gradients.

Evaluation

The ColorSequence type does not have a built-in method for getting the value at a certain time/point. However, you can use the following function to evaluate at a specific time.

local function evalColorSequence(sequence: ColorSequence, time: number)
    -- If time is 0 or 1, return the first or last value respectively
    if time == 0 then
        return sequence.Keypoints[1].Value
    elseif time == 1 then
        return sequence.Keypoints[#sequence.Keypoints].Value
    end

    -- Otherwise, step through each sequential pair of keypoints
    for i = 1, #sequence.Keypoints - 1 do
        local thisKeypoint = sequence.Keypoints[i]
        local nextKeypoint = sequence.Keypoints[i + 1]
        if time >= thisKeypoint.Time and time < nextKeypoint.Time then
            -- Calculate how far alpha lies between the points
            local alpha = (time - thisKeypoint.Time) / (nextKeypoint.Time - thisKeypoint.Time)
            -- Evaluate the real value between the points using alpha
            return Color3.new(
                (nextKeypoint.Value.R - thisKeypoint.Value.R) * alpha + thisKeypoint.Value.R,
                (nextKeypoint.Value.G - thisKeypoint.Value.G) * alpha + thisKeypoint.Value.G,
                (nextKeypoint.Value.B - thisKeypoint.Value.B) * alpha + thisKeypoint.Value.B
            )
        end
    end
end

local colorSequence = ColorSequence.new{
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 0, 0)),
    ColorSequenceKeypoint.new(0.5, Color3.fromRGB(0, 190, 200)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(190, 0, 255))
}

print(evalColorSequence(colorSequence, 0.75))  --> 0.372549, 0.372549, 0.892157

Constructors

ColorSequence.new

Returns a sequence of two keypoints with c for both the start and end values.

local colorSequence = ColorSequence.new(c)
-- Equivalent to
local colorSequence = ColorSequence.new{
    ColorSequenceKeypoint.new(0, c),
    ColorSequenceKeypoint.new(1, c)
}

Parameters

ColorSequence.new

Returns a new ColorSequence with c0 as the start value and c1 as the end value.

local colorSequence = ColorSequence.new(c0, c1)
-- Equivalent to
local colorSequence = ColorSequence.new{
    ColorSequenceKeypoint.new(0, c0),
    ColorSequenceKeypoint.new(1, c1)
}

Parameters

ColorSequence.new

Returns a new ColorSequence from an array of ColorSequenceKeypoints. The keypoints must be in a non-descending time value order. At least two keypoints must be provided, and they must have a time value of 0 (first) and 1 (last).

local red = Color3.fromRGB(255, 0, 0)
local cyan = Color3.fromRGB(0, 190, 200)
local purple = Color3.fromRGB(190, 0, 255)

local colorSequence = ColorSequence.new{
    ColorSequenceKeypoint.new(0, red),
    ColorSequenceKeypoint.new(0.5, cyan),
    ColorSequenceKeypoint.new(1, purple)
}

Parameters

Properties

ColorSequence.Keypoints

An array containing ColorSequenceKeypoint values for the ColorSequence.